Construction method of high-wear-resistance reinforced concrete floor

Abstract

The invention relates to a construction method of a high-wear-resistance reinforced concrete floor. The construction method comprises the following construction steps: fully mixing all raw materials by using a concrete mixer to obtain high-wear-resistance concrete; high-wear-resistance concrete is poured into the formwork, and the surface of the concrete is scraped to be flat after the concrete is compacted and bubbles are removed; uniformly spreading non-metal wear-resistant aggregate accounting for 2 / 3 of the total amount on the surface of the concrete at the initial setting stage, and performing grinding treatment after the color of the edges of all the wear-resistant aggregate becomes dark; the non-metal wear-resistant aggregate accounting for 1 / 3 of the total dosage is spread for the second time, and after the surfaces of all the wear-resistant aggregate spread for the second time get damp and the color of the edges becomes dark, the wear-resistant aggregate is ground to obtain the high-wear-resistance reinforced concrete floor. The total amount of the non-metal wear-resistant aggregate is the product of 4kg / m < 3 > and the surface area of the concrete to be paved; and 8-12 hours after the high-wear-resistance reinforced concrete floor is completed, the high-wear-resistance reinforced concrete floor is kept wet in a water spraying mode so as to be maintained.

Description

Technical Field

[0001] The invention relates to the technical field of ground construction, and in particular to a highly wear-resistant reinforced concrete ground construction method. Background Art

[0002] Wear-resistant flooring is a floor treatment method that is made by spreading wear-resistant materials evenly on the surface of concrete during the initial setting stage of the base concrete. After professional mechanical construction, the wear-resistant materials and the concrete floor form a whole. It is a floor treatment method that has the characteristics of anti-corrosion, wear resistance, anti-slip, low pollution and strong decorative effect. This floor has the advantages of wear resistance, high compression resistance, economic durability, etc., and is easy to construct, pollution-free and inexpensive. It has been widely used in industrial floors and places with high environmental requirements.

[0003] However, existing concrete floor materials are insufficient in terms of wear resistance, especially in high-intensity use environments such as industrial plants and warehouses, where traditional concrete is prone to problems such as wear and cracking. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a highly wear-resistant reinforced concrete floor construction method.

[0005] To solve the above problems, the technical solution adopted by the present invention is: A highly wear-resistant reinforced concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; Step S2, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind the edges of all the spread wear-resistant aggregate until the color becomes darker; then, spread non-metallic wear-resistant aggregate for the second time accounting for 1 / 3 of the total amount, and grind the edges of all the spread wear-resistant aggregate until the color becomes darker to obtain a highly wear-resistant reinforced concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; The non-metallic wear-resistant aggregate comprises the following components in parts by weight: 480-720 parts of copper ore, 320-480 parts of ordinary Portland cement, 4-6 parts of silica powder, 2.4-3.6 parts of calcium formate, 0.4-0.6 parts of carbon black, 2.4-3.6 parts of high-performance water reducer; Step S4: 8-12 hours after the completion of the highly wear-resistant reinforced concrete floor, watering is used to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0006] As an embodiment of the present invention, the raw materials of the highly wear-resistant concrete include: water, cementitious material, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious material include, by mass percentage: 61-66% of ordinary Portland cement, 15-20% of secondary fly ash, and 19% of S95 grade slag powder; The water-cement ratio is 0.43-0.45, the addition amount of high-performance water-reducing agent is 0.8-1.1% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:(2.85-3):(3.3-3.6); As an embodiment of the present invention, the sand is medium sand with a firmness of <8%, a mud content of <2%, and a mud block content of <0.5%.

[0007] As an embodiment of the present invention, the stone is crushed stone with a crushing index of 2.4 and a bulk density of 1792 kg / m 3 , mud content is 0.1%, apparent density is 3.164 kg / m 3 , the water absorption rate is 0.79%.

[0008] As an embodiment of the present invention, the high-performance water reducing agents in the high-wear-resistant concrete and the non-metallic wear-resistant aggregate are both polycarboxylic acid high-performance water reducing agents.

[0009] As an implementation mode of the present invention, the loss on ignition of the secondary fly ash is ≤3%, and the water content is ≤0.3%.

[0010] As an embodiment of the present invention, the specific surface area of ​​the S95 grade slag powder is ≥420m 3 / kg, activity index 7d ≥ 90%, fluidity ratio ≥ 101%, loss on ignition ≤ 0.2%, water content ≤ 0.4%.

[0011] As an embodiment of the present invention, it also includes: Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the floor is completed, and the cutting spacing is controlled at 6-8 meters; before cutting, the cutting line is marked with an ink fountain, and the cutting depth is 1 / 3 of the thickness of the highly wear-resistant reinforced concrete floor.

[0012] As an implementation mode of the present invention, step S1 includes: Step S101, weighing ordinary Portland cement, secondary fly ash, S95 slag powder, high-performance water reducing agent, sand, gravel and water according to the proportion; Step S102, mixing the high performance water reducing agent with water and then pouring it into a concrete mixer; Step S103, add ordinary Portland cement, secondary fly ash, S95 slag powder, sand and gravel into a concrete mixer in sequence, and stir at 45 r / min for 4-5 minutes to obtain a concrete mixture.

[0013] As an embodiment of the present invention, the preparation steps of the non-metallic wear-resistant aggregate are as follows: S301. Pour copper ore sand, ordinary Portland cement, silica powder, calcium formate, carbon black and water reducing agent into a concrete mixer according to the proportion, and stir at 45 r / min for 2-3 minutes to obtain a wear-resistant aggregate mixture.

[0014] The beneficial effects of adopting the above technical solution are: The method for constructing a highly wear-resistant reinforced concrete floor provided by the present invention comprises the following steps: weighing raw materials according to a designed proportion and mixing the raw materials; then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; pouring the highly wear-resistant concrete into a prepared formwork, using a vibrator to compact the concrete and remove bubbles, and then using a leveling tool to flatten the concrete surface; evenly spreading non-metallic wear-resistant aggregates accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grinding the edges of all the spread wear-resistant aggregates after the colors become darker; then, spreading the non-metallic wear-resistant aggregates accounting for 1 / 3 of the total amount for the second time, and grinding the edges of all the spread wear-resistant aggregates after the colors become darker to obtain the highly wear-resistant reinforced concrete floor; the total amount of the non-metallic wear-resistant aggregates is 4kg / m 3 and the product of the surface area of ​​the concrete to be spread; wherein the non-metallic wear-resistant aggregate includes the following components in parts by weight: 480-720 parts of copper ore sand, 320-480 parts of ordinary Portland cement, 4-6 parts of silicon micropowder, 2.4-3.6 parts of calcium formate, 0.4-0.6 parts of carbon black, and 2.4-3.6 parts of high-performance water reducer; 8-12 hours after the completion of the high-wear-resistant reinforced concrete floor, watering is used to keep the high-wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0015] The concrete floor obtained by the method provided in the embodiment of the present invention has excellent compressive strength, flexural strength and high wear resistance, which ensures the quality of floor construction, meets the construction period requirements, avoids a series of construction period and cost problems caused by rework due to substandard floor flatness in the later stage, and saves costs. DETAILED DESCRIPTION

[0016] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is clearly and completely described below in conjunction with specific embodiments.

[0017] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market. Among them: Ordinary Portland cement, Quzhai P.O42.5 ordinary Portland cement, Luquan Quzhai Cement Co., Ltd.; Secondary fly ash, Lingshou County Qiangdong Mineral Products Processing Plant; S95 grade slag powder, Tangshan Ganglu Steel Co., Ltd.; Sand, medium sand in Zone II, Beijing Weike Metallurgical Co., Ltd.; Shizi, Beijing Weike Metallurgical Co., Ltd.; Polycarboxylic acid high performance water reducing agent, water reducing rate is 27%, HLX type polycarboxylic acid; Copper ore sand, particle size 3.5mm-4.5mm, Taizhou Zhongchuan Abrasives Co., Ltd.; Silica powder, active SiO 2 The content is 73-93%, the average particle size is 0.03-0.8μm, Lingshou County Yongshun Mineral Products Processing Plant Calcium formate, Hebei Liqia Biotechnology Co., Ltd. Carbon black, Lingshou County Yongshun Mineral Products Processing Plant.

[0018] Example 1 A highly wear-resistant reinforced concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 61% of ordinary Portland cement, 20% of secondary fly ash, and 19% of S95 grade slag powder; The water-cement ratio is 0.43, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.85:3.3; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, so that the moisture can be completely secreted to obtain a highly wear-resistant reinforced concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 480 parts of copper ore sand, 480 parts of ordinary Portland cement, 6 parts of silica powder, 2.4 parts of calcium formate, 0.4 parts of carbon black, and 2.4 parts of high-performance water reducer; Step S4: 8 hours after the completion of the highly wear-resistant reinforced concrete floor, watering is used to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0019] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the floor is completed, and the cutting interval is controlled at 6 meters; before cutting, the cutting line is marked with an ink fountain, and the cutting depth is 50mm of the thickness of the highly wear-resistant reinforced concrete floor (the thickness of the concrete floor is 150mm).

[0020] Example 2 A highly wear-resistant reinforced concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 64% of ordinary Portland cement, 17% of secondary fly ash and 19% of S95 grade slag powder; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, so that the moisture can be completely secreted to obtain a highly wear-resistant reinforced concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the completion of the highly wear-resistant reinforced concrete floor, watering is used to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0021] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the floor is completed, and the cutting interval is controlled at 7 meters; before cutting, the cutting line is marked with an ink fountain, and the cutting depth is 50mm of the thickness of the highly wear-resistant reinforced concrete floor (the thickness of the concrete floor is 150mm).

[0022] Example 3 A highly wear-resistant reinforced concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 66% of ordinary Portland cement, 15% of secondary fly ash, and 19% of S95 grade slag powder; The water-cement ratio is 0.45, the addition amount of high-performance water-reducing agent is 1.1% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.85:3.6; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, so that the moisture can be completely secreted to obtain a highly wear-resistant reinforced concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 720 parts of copper ore sand, 320 parts of ordinary Portland cement, 4 parts of silica powder, 3.6 parts of calcium formate, 0.6 parts of carbon black, and 3.6 parts of high-performance water reducer; Step S4: 8 hours after the completion of the highly wear-resistant reinforced concrete floor, watering is used to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0023] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 8 meters; before cutting the seams, the cutting line is marked with an ink fountain, and the cutting depth is 50mm of the thickness of the highly wear-resistant reinforced concrete floor (the thickness of the concrete floor is 150mm).

[0024] Comparative Example 1 A concrete floor construction method comprises the following construction steps: S1. Weigh the raw materials according to the designed proportion and mix them, then use a concrete mixer to fully mix all the raw materials to obtain wear-resistant concrete; The raw materials of the wear-resistant concrete include: water, ordinary Portland cement, sand, gravel and high-performance water reducing agent; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring the wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, to obtain a concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the concrete floor is completed, the concrete floor is moistened by sprinkling water for curing, and the curing time is 7 days.

[0025] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 7 meters; before cutting the seams, use an ink fountain to mark the cutting lines, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0026] Comparative Example 2 A concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain wear-resistant concrete; The raw materials of the wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include: 81% of ordinary Portland cement and 19% of S95 grade slag powder by mass percentage; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring the wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker to obtain the concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the concrete floor is completed, water is sprinkled to keep the concrete floor moist for curing, and the curing time is 7 days.

[0027] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 7 meters; before cutting the seams, use an ink fountain to mark the cutting lines, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0028] Comparative Example 3 A concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain wear-resistant concrete; The raw materials of the wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: ordinary Portland cement 71%, secondary fly ash 19%, S95 grade slag powder 10%; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring the wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker to obtain a high concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the concrete floor is completed, water is sprinkled to keep the concrete floor moist for curing, and the curing time is 7 days.

[0029] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 7 meters; before cutting the seams, use an ink fountain to mark the cutting lines, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0030] Comparative Example 4 A concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 64% of ordinary Portland cement, 17% of secondary fly ash and 19% of S95 grade slag powder; The water-cement ratio is 0.43, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.85:3.3; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker to obtain the concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 480 parts of copper ore sand, 480 parts of ordinary Portland cement, 2.4 parts of calcium formate, 0.4 parts of carbon black, and 2.4 parts of high-performance water reducer; Step S4: 8 hours after the concrete floor is completed, water is sprinkled to keep the concrete floor moist for curing, and the curing time is 7 days.

[0031] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the floor is completed, and the cutting interval is controlled at 6 meters. Before cutting, use an ink fountain to mark the cutting line, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0032] Comparative Example 5 A concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 64% of ordinary Portland cement, 17% of secondary fly ash and 19% of S95 grade slag powder; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, before initial setting, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, so that the moisture can be completely secreted to obtain the concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the concrete floor is completed, water is sprinkled to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0033] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 7 meters; before cutting the seams, use an ink fountain to mark the cutting lines, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0034] Comparative Example 6 A concrete floor construction method comprises the following construction steps: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 64% of ordinary Portland cement, 17% of secondary fly ash and 19% of S95 grade slag powder; The water-cement ratio is 0.44, the addition amount of high-performance water-reducing agent is 0.8% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:2.87:3.47; Step S2, pouring in sections, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, after initial setting, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface, and grind it after the surface of the spread wear-resistant aggregate becomes damp and the edge color of all wear-resistant aggregates becomes darker; then, spread non-metallic wear-resistant aggregate accounting for 1 / 3 of the total amount for the second time, and grind it after the surface of all wear-resistant aggregates spread for the second time becomes damp and the edge color becomes darker, so that the moisture can be completely secreted to obtain the concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; Non-metallic wear-resistant aggregates include: 600 parts of copper ore sand, 400 parts of ordinary Portland cement, 5 parts of silica powder, 3 parts of calcium formate, 0.5 parts of carbon black, and 3 parts of high-performance water reducing agent; Step S4: 8 hours after the concrete floor is completed, water is sprinkled to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

[0035] Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the completion of the floor, and the cutting interval is controlled at 7 meters; before cutting the seams, use an ink fountain to mark the cutting lines, and the cutting depth is 50mm of the thickness of the concrete floor (the thickness of the concrete floor is 150mm).

[0036] Effect example GB / T17671-1999 "Test Method for Strength of Cement Mortar" was used to test the 28d compressive strength (MPa) of the samples obtained from Examples 1 to 3 and Comparative Examples 1 to 7; According to GB / T17671-1999 “Test method for strength of cement mortar”, the samples obtained from Examples 1 to 3 and Comparative Examples 1 to 7 were tested for 28d flexural strength (MPa).

[0037] The samples obtained from Examples 1 to 3 and Comparative Examples 1 to 7 were subjected to a wear resistance test (wear pit length method) using a steel wheel wear tester: Test method: Prepare a 100*100*100mm cubic test block, take it out from the curing site after curing for 27 days, wipe off the surface moisture and place it in the laboratory air to dry naturally for 12 hours, then put it in a 60℃±5℃ oven and dry it for 12 hours, with the wear surface facing up. Put the test abrasive into the abrasive hopper and then let it flow into the diversion hopper. Fix the specimen on the clamping pulley so that the specimen surface is parallel to the axis of the friction steel wheel and perpendicular to the bracket base. The distance between the side of the friction steel wheel and the edge of the specimen should not be less than 15mm. Adjust the valve so that the abrasive should fall evenly on the friction steel wheel from the rectangular discharge port of the diversion hopper at a flow rate of 11 / min. Under the action of the counterweight, make the surface of the specimen contact with the friction steel wheel. Start the motor, open the hopper regulating valve, and start timing. After the friction steel wheel rotates for 2 minutes, turn off the motor, adjust the valve, remove the clamping pulley, remove the specimen, and measure the length of the groove or pit formed after the surface is worn.

[0038] The samples obtained in Examples 1 to 3 and Comparative Examples 1 to 5 were used to make cubic test blocks of 100*100*100 mm and perform splitting tensile strength tests using a YAD-200 universal press.

[0039] Test method: Select the relatively flat surface of the cubic test block as the stress surface and draw a splitting line on its surface; place the cubic test block between the pressure plates, the pressure plates should be strictly aligned with the splitting line, and after it is placed steadily, start the testing machine; apply a uniform load at a loading speed of 7kN / s, and load until the test block stops breaking, and obtain the splitting tensile strength.

[0040] The results are shown in Table 1.

[0041] Table 1 It can be seen from Table 1 that the concrete floor obtained by the construction method provided by the present invention has excellent compressive strength, flexural strength, and high wear resistance.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly wear-resistant reinforced concrete floor construction method, characterized in that: The construction steps include: Step S1, weighing raw materials according to the designed proportion, and then using a concrete mixer to fully mix all the raw materials to obtain highly wear-resistant concrete; Step S2, pouring high wear-resistant concrete into the prepared formwork, using a vibrator to compact the concrete to remove bubbles, and then using a leveling tool to flatten the concrete surface; Step S3, evenly spread non-metallic wear-resistant aggregate accounting for 2 / 3 of the total amount on the concrete surface in the initial setting stage, and grind the edges of all the spread wear-resistant aggregate until the color becomes darker; then, spread non-metallic wear-resistant aggregate for the second time accounting for 1 / 3 of the total amount, and grind the edges of all the spread wear-resistant aggregate until the color becomes darker to obtain a highly wear-resistant reinforced concrete floor; the total amount of non-metallic wear-resistant aggregate is 4kg / m 3 The product of the surface area of ​​concrete to be spread; The non-metallic wear-resistant aggregate comprises the following components in parts by weight: 480-720 parts of copper ore, 320-480 parts of ordinary Portland cement, 4-6 parts of silica powder, 2.4-3.6 parts of calcium formate, 0.4-0.6 parts of carbon black, 2.4-3.6 parts of high-performance water reducer; Step S4: 8-12 hours after the completion of the highly wear-resistant reinforced concrete floor, watering is used to keep the highly wear-resistant reinforced concrete floor moist for maintenance, and the maintenance time is 7 days.

2. A highly wear-resistant reinforced concrete floor construction method according to claim 1, characterized in that: The raw materials of the highly wear-resistant concrete include: water, cementitious materials, sand, gravel and high-performance water reducing agent, wherein the raw materials of the cementitious materials include, by mass percentage: 61-66% of ordinary Portland cement, 15-20% of secondary fly ash, and 19% of S95 grade slag powder; The water-cement ratio is 0.43-0.45, the addition amount of high-performance water-reducing agent is 0.8-1.1% of the mass of ordinary Portland cement, and the mass ratio of ordinary Portland cement, sand and gravel is 1:(2.85-3):(3.3-3.6).

3. A highly wear-resistant reinforced concrete floor construction method according to claim 2, characterized in that: The sand is medium sand with a firmness of <8%, a mud content of <2%, and a mud lump content of <0.5%.

4. A highly wear-resistant reinforced concrete floor construction method according to claim 2, characterized in that: The stone is crushed stone with a diameter of 10-20 mm, a crushing index of 2.4, and a bulk density of 1792 kg / m 3 , mud content is 0.1%, apparent density is 3.164 kg / m 3 , the water absorption rate is 0.79%.

5. A highly wear-resistant reinforced concrete floor construction method according to claim 1, characterized in that: The high performance water reducers in high wear-resistant concrete and non-metallic wear-resistant aggregates are all polycarboxylic acid high performance water reducers.

6. A highly wear-resistant reinforced concrete floor construction method according to claim 2, characterized in that: The loss on ignition of the secondary fly ash is ≤3%, and the water content is ≤0.3%.

7. A highly wear-resistant reinforced concrete floor construction method according to claim 2, characterized in that: The specific surface area of ​​the S95 grade slag powder is ≥420m 3 / kg, activity index 7d ≥ 90%, fluidity ratio ≥ 101%, loss on ignition ≤ 0.2%, water content ≤ 0.4%.

8. A highly wear-resistant reinforced concrete floor construction method according to claim 1, characterized in that: It also includes: Step S5, cutting construction joints during curing: On the second day after the ground is completed, a construction joint is set at the dividing joint. After the mold is removed, a cutting machine is used to cut the dividing joint into a straight line, and the floating slurry on the uncast side concrete is removed. Before casting again, a film is used to separate the new and old concrete at the construction joint to prevent contamination of the cast ground; The separation seams are cut 3 days after the floor is completed, and the cutting spacing is controlled at 6-8 meters; before cutting, the cutting line is marked with an ink fountain, and the cutting depth is 1 / 3 of the thickness of the highly wear-resistant reinforced concrete floor.

9. A highly wear-resistant reinforced concrete floor construction method according to claim 1, characterized in that: Step S1 includes: Step S101, weighing ordinary Portland cement, secondary fly ash, S95 slag powder, high-performance water reducing agent, sand, gravel and water according to the proportion; Step S102, mixing the high performance water reducing agent with water and then pouring it into a concrete mixer; Step S103, add ordinary Portland cement, secondary fly ash, S95 slag powder, sand and gravel into a concrete mixer in sequence, and stir at 45 r / min for 4-5 minutes to obtain a concrete mixture.

10. A highly wear-resistant reinforced concrete floor construction method according to claim 1, characterized in that: The preparation steps of the non-metallic wear-resistant aggregate are as follows: S301. Pour copper ore, ordinary Portland cement, silica powder, calcium formate, carbon black and water reducing agent into a concrete mixer according to the proportion, and stir at 45 r / min for 2-3 minutes to obtain a wear-resistant aggregate mixture.

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