Method for improving concrete pouring quality of civil building floor

Abstract

The invention relates to the field of civil buildings, in particular to a concrete construction technology of the civil buildings, in particular to a method for improving the floor concrete pouring quality of the civil buildings, which comprises the steps of rechecking the one-meter line elevation of the building, increasing the number of ash cakes and judging the surface calendering requirement by means of footprints. According to the method for improving the floor concrete pouring quality of the civil building, the one-meter line elevation of the building is rechecked, and the number of ash cakes is increased; by means of measures such as strengthening management, strengthening training and the like, the quality of building floor fine aggregate concrete pouring can be effectively improved, the project department strictly implements the construction procedure in subsequent building floor fine aggregate concrete construction, the one-time acceptance pass rate of each construction procedure can reach 90% or above, and the qualified rate of spot check of the completed building floor can reach 90% or above.

Description

Technical Field

[0001] The invention relates to the field of civil buildings, in particular to a concrete construction technology for civil buildings, and specifically to a method for improving the quality of concrete pouring on floors of civil buildings. Background Art

[0002] The construction period is the window of the project image and the source of benefits. For residential buildings, the project period is often tight and the task is heavy. It is very easy to ignore the construction quality, which can easily lead to frequent construction quality problems, resulting in ground cracks, hollows, poor flatness, poor appearance quality and other construction quality problems. The floor fine stone concrete construction process is more, and the requirements for the surface finishing quality and elevation are high. It is difficult to repair, which ultimately affects the overall construction quality of the project and even delays the construction period. Once such construction quality problems occur, the delay is wide and the repair is difficult. In serious cases, it can lead to irreparable losses.

[0003] Through the cause search, it was found that the causes of the above concrete construction quality problems are: 1. The construction plan and construction method are not perfect; 2. The elevation control is unreasonable and the number of ash cakes is too small. 3. The maintenance time is short and maintenance is not carried out in time. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects and provide a method for improving the quality of concrete pouring of civil building floors.

[0005] In order to achieve the above object, the present invention is achieved in the following ways: A method for improving the quality of concrete pouring on civil building floors at least includes the steps of reviewing the one-meter elevation of the building; increasing the number of ash cakes; and judging the need for surface calendering based on footprints.

[0006] The above method for improving the quality of concrete pouring of civil building floors specifically includes: Step 1: Base treatment; Step 2: Find the elevation and draw the line; Step 3: Sprinkle water to moisten; Step 4: Apply plaster cakes and marking reinforcement; apply a layer of cement slurry; Step 5: Stir the thermal insulation mortar; Step 6: Lay the surface layer of thermal insulation mortar; Step 7: Use wooden scraper to level the surface; Step 8: Use the iron trowel to press for the first time; Step 9: Lay fine stone concrete; Step 10: Smooth with wooden trowel; Step 11: Use iron trowel to calender for the second time; Step 12, spread cement mortar for the third time, press and polish; Step 13: Maintenance; in: In step 2, use an infrared level to lead from the floor elevation control line into the house, place a one-meter building line on the wall, and measure the elevation of the floor surface layer downward according to the one-meter building line on the wall; the one-meter line must be accurately measured, and before subsequent construction, the one-meter line must be checked again, especially the errors between the sets on the same floor and the elevation lines of the public parts; In step 4, determine the thickness of the surface plastering according to the horizontal line of the surface elevation on the walls around the room, draw a horizontal line and start applying plaster cakes. The horizontal and vertical spacing between the plaster cakes is 1.5-2.0m, and the plane on the plaster cake is the ground surface elevation; the size of the plaster cake is controlled within 5cm×5cm; the mortar material mix ratio of the plaster cake is the same as the mortar for plastering the ground; as an aid for the large distance between the plaster cakes, carry out rib punching, spread the cement mortar between the plaster cakes with the same width as the plaster cakes, and use a wooden trowel to make it level with the upper surface of the plaster cake.

[0007] In the above method for improving the quality of pouring concrete for civil building floors, in steps 10 to 12, after the gray surface of the surface layer absorbs water, it is vigorously rubbed and smoothed with a wooden trowel, and the dry cement sand mixture is mixed with the slurry of fine stone concrete to make the surface layer tightly bonded; the first time of smoothing and pressing: lightly smoothing and pressing with an iron trowel until the slurry comes out; the second time of smoothing and pressing: after the surface mortar is initially set, there are footprints on the surface layer of the ground but it does not sink when walked on, the second time of smoothing and pressing is performed with an iron trowel to fill and smooth the pits and sand holes, and be careful not to leak; the third time of smoothing and pressing: before the final setting of the surface mortar, that is, when there are slight footprints when people step on it, and there are no traces of smoothing with an iron trowel, the third time of smoothing can be performed with an iron trowel. This time, it should be smoothed and pressed hard to flatten and smooth all the smoothing marks to achieve a dense and smooth surface of the surface layer. The smoothing should be completed before the final setting.

[0008] The method for improving the quality of pouring concrete on the floors of civil buildings proposed in the present invention can effectively improve the quality of pouring fine stone concrete on floors by reviewing the one-meter elevation of the building, increasing the number of ash cakes, and strengthening management, training and other measures. The project department strictly implements this construction process in the subsequent fine stone concrete construction on floors, and the acceptance rate of each construction process can reach more than 90%, and the qualified rate of spot checks on completed floors can reach more than 90%. DETAILED DESCRIPTION

[0009] The technical solutions of the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection requested by the present application.

[0010] A method for improving the quality of concrete pouring on civil building floors, comprising: Step 1: Base treatment; Use a grinder to remove debris from the floor, then rinse with clean water and remove the garbage removed; the grinder should be used thoroughly, specifically grinding the corners of the room, and removing the dust and masonry mortar to reduce the occurrence of hollows on the floor; Step 2: Find the elevation and draw the line; Use an infrared level to lead from the floor elevation control line into the house, place a one-meter building line on the wall, and measure the elevation of the floor surface layer downwards according to the one-meter building line on the wall; the one-meter line must be accurately measured, and before subsequent construction, the one-meter line must be rechecked, especially the errors between the sets on the same floor and the elevation lines of the public parts; Step 3: Sprinkle water to moisten; Step 4: Apply plaster cakes and marking reinforcement; apply a layer of cement slurry; According to the surface elevation level line on the walls around the room, determine the surface plaster thickness, draw a horizontal line and start plastering the plaster cakes. The horizontal and vertical spacing between the plaster cakes is 1.5-2.0m, and the plane on the plaster cake is the ground surface elevation; the size of the plaster cake is controlled within 5cm×5cm; the mortar material mix ratio of the plaster cake is the same as the mortar for plastering the ground; as an aid for the large spacing between plaster cakes, carry out reinforcement, spread cement mortar between the plaster cakes with the same width as the plaster cakes, and use a wooden trowel to make it level with the upper surface of the plaster cake; the reinforcement surface should be flat, without protrusions or depressions, the reinforcement should not be too wide, and the strength of the cement mortar for reinforcement should be consistent with the ground; Check and inspect the elevation to ensure that the ground leveling elevation is correct; if inaccurate elevation is found, the unqualified ribs should be reprocessed to prevent the overall ground elevation from being too high or too low after the leveling is completed; the elevation of the ash cake should be rechecked to ensure that the error of the ash cake elevation from the one-meter line of the building is within the range of ±2mm before starting the rib work; start applying cement slurry after the base layer is dry; mechanically stir it into a viscous slurry in proportion to make it uniform and free of lumps, use a trowel to apply the slurry to the surface of the base layer at one time, and control the thickness between 2 and 4mm. The mixed cement slurry should be applied within 3 hours Step 5: Stir the thermal insulation mortar; Step 6: Lay the surface layer of thermal insulation mortar; In the above steps 5 and 6, prepare the thermal insulation mortar: the thermal insulation mortar is made of vitrified microsphere thermal insulation mortar. First, add water to the mortar mixer, then add the thermal insulation mortar dry mix, and stir until it is evenly mixed and sticky. The stirring time is 3min~5min. It can be used after standing for 3min~5min and should be used up within 2h. When constructing the vitrified micro-bead insulation mortar, it should be done in several times according to the designed thickness, and the interval between each plastering should be more than 24 hours; the first plastering should be evenly compacted, and the thickness should not exceed 15mm. Pay attention to smoothing the second time. When the thickness reaches the thickness of the reinforcement, first use a large bar to smooth it, and then use a wooden trowel to smooth and compact it; the bonding between the insulation layer and the base layer must be firm, and there should be no delamination, hollowing and cracking; when constructing the insulation mortar surface layer, the insulation mortar layer should be constructed within 5 to 10 minutes after the interface agent is applied; spread the mortar evenly between the ash cakes or the marking bars, and then use a wooden scraper to scrape it flat according to the height of the ash cakes or marking bars; when laying the mortar, if the ash cakes or marking bars have hardened, after the wooden scraper is scraped flat, the red ash cakes or marking bars will be knocked off at the same time, and filled with mortar; Step 7: Use wooden scraper to level the surface; Step 8: Use the iron trowel to press for the first time; Step 9: Lay fine stone concrete; When constructing fine stone concrete, the surface fine stone concrete is laid: spread the fine stone concrete on the ground base, then use a 2m long scraper to scrape it along the marked reinforcement, and then use a concrete or iron roller with a diameter of 20cm and a length of 60cm to roll back and forth, vertically and horizontally. When the thickness is thicker, use a flat vibrator. If there are concave places, fill them with concrete of the same mix ratio until water seepage appears on the surface layer. Spread a layer of 1:1 cement mortar, spread it evenly, and then scrape it with a 2m long scraper. When operating, walk back from the room to the outside, and the smoothing should be completed before the initial setting; the thickness of the cement concrete surface layer should meet the design requirements; no construction joints should be left when laying the cement concrete surface layer; when the construction gap exceeds the allowable time regulations, the joints should be treated; Step 10: Smooth with wooden trowel; Step 11: Use iron trowel to calender for the second time; Step 12, spread cement mortar for the third time, press and polish; In steps 10 to 12, after the surface layer absorbs water, use a wooden trowel to rub and smooth it vigorously, mix the dry cement-sand mixture with the fine stone concrete slurry, and make the surface layer tightly bonded; the first time of smoothing: use an iron trowel to gently smooth it once until the slurry comes out; the second time of smoothing: after the surface mortar has initially set, there are footprints on the surface layer of the ground but it does not sink when you walk on it, use an iron trowel to smooth it for the second time, fill and smooth the pits and sand holes, and be careful not to miss any holes; the third time of smoothing: before the surface mortar is finally set, that is, there are slight footprints when people step on it, and it is smoothed with an iron trowel without any traces, you can use the iron trowel to smooth it for the third time. This time, you need to smooth it hard to flatten and polish all the traces to make the surface layer dense and smooth. Polishing should be completed before the final setting.

[0011] Step 13: Maintenance; 24 hours after the surface layer is applied, it should be covered with plastic film for curing and watered. The curing time is generally at least 7 days. The compressive strength should reach 5MPa before people are allowed to walk on it. It can only be used normally after the compressive strength reaches the design requirements.

[0012] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for improving the quality of concrete pouring on civil building floors, characterized by: At least include Steps to review the one-meter elevation of a building; Steps to increase the amount of ash cake; Steps to determine surface calendering needs based on footprints.

2. The method for improving the quality of concrete pouring of civil building floors according to claim 1 is characterized in that: Specifically include Step 1: Base treatment; Step 2: Find the elevation and draw the line; Step 3: Sprinkle water to moisten; Step 4: Apply plaster cakes and marking reinforcement; apply a layer of cement slurry; Step 5: Stir the thermal insulation mortar; Step 6: Lay the surface layer of thermal insulation mortar; Step 7: Use wooden scraper to level the surface; Step 8: Use the iron trowel to press for the first time; Step 9: Lay fine stone concrete; Step 10: Smooth with wooden trowel; Step 11: Use iron trowel to calender for the second time; Step 12, spread cement mortar for the third time, press and polish; Step 13: Maintenance; in: In step 2, use an infrared level to lead from the floor elevation control line into the house, place a one-meter building line on the wall, and measure the elevation of the floor surface layer downward according to the one-meter building line on the wall; the one-meter line must be accurately measured, and before subsequent construction, the one-meter line must be checked again, especially the errors between the sets on the same floor and the elevation lines of the public parts; In step 4, determine the thickness of the surface plastering according to the horizontal line of the surface elevation on the walls around the room, draw a horizontal line and start applying plaster cakes. The horizontal and vertical spacing between the plaster cakes is 1.5-2.0m, and the plane on the plaster cake is the ground surface elevation; the size of the plaster cake is controlled within 5cm×5cm; the mortar material mix ratio of the plaster cake is the same as the mortar for plastering the ground; as an aid for the large distance between the plaster cakes, carry out rib punching, spread the cement mortar between the plaster cakes with the same width as the plaster cakes, and use a wooden trowel to make it level with the upper surface of the plaster cake.

3. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized in that: In step 4, the rib surface should be flat, without protrusions or depressions, the ribs should not be too wide, and the strength of the cement mortar for the ribs should be consistent with the ground; check and inspect the elevation of the marked ribs to ensure that the ground leveling elevation is correct; if inaccurate elevations are found, the unqualified ribs should be reprocessed to prevent the overall ground elevation from being too high or too low after the subsequent leveling; the elevation of the ash cake should be reviewed to ensure that the error of the ash cake elevation from the one-meter line of the building is within the range of ±2mm before starting the rib work; start applying cement slurry after the base layer is dry; mechanically stir it into a viscous slurry in proportion to make it uniform and lump-free, use a trowel to apply the slurry to the surface of the base layer at one time, and control the thickness between 2 and 4mm. The mixed cement slurry should be applied within 3 hours.

4. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized in that: In step 1, use a grinder to remove debris from the ground, then rinse it with clean water and remove the cleaned garbage; the grinder should be polished thoroughly, and the corners of the room should be polished specifically, and the dust and masonry mortar should be removed to reduce the occurrence of hollows on the ground.

5. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized in that: In step 5 and step 6, prepare the thermal insulation mortar: the thermal insulation mortar is made of vitrified micro-bead thermal insulation mortar. First, add water to the mortar mixer, and then add the thermal insulation mortar dry mix until it is evenly mixed and sticky. The stirring time is 3min~5min. It can be used after standing for 3min~5min and should be used up within 2h. When constructing vitrified micro-bead insulation mortar, it should be completed in several passes according to the designed thickness, and the interval time between each pass should be more than 24 hours; the first pass of plastering should be evenly compacted, and the thickness should not exceed 15mm. Pay attention to smoothing the second pass. When the thickness reaches the thickness of the reinforcement, first use a large bar to smooth it, and then use a wooden trowel to smooth and compact it; the bonding between the insulation layer and the base layer must be firm, and there should be no delamination, hollowing and cracking; when constructing the insulation mortar surface layer, the insulation mortar layer should be constructed within 5 to 10 minutes after the interface agent is applied; spread the mortar evenly between the ash cakes or the marking bars, and then use a wooden scraper to scrape it flat according to the height of the ash cakes or marking bars; when spreading the mortar, if the ash cakes or marking bars have hardened, after the wooden scraper is scraped flat, the red ash cakes or marking bars will be knocked off at the same time, and filled with mortar.

6. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized by: In step 9, when constructing fine stone concrete, the surface fine stone concrete is laid: spread the fine stone concrete on the ground base, then use a 2m long scraper to scrape it along the marked reinforcement, and then use a concrete or iron roller with a diameter of 20cm and a length of 60cm to roll back and forth, vertically and horizontally. When the thickness is thicker, use a flat vibrator. If there are concave places, fill them with concrete of the same mix ratio until water seepage appears on the surface layer, spread a layer of 1:1 cement mortar, spread it evenly, and then scrape it with a 2m long scraper. When operating, walk back from the room to the outside, and smoothing should be completed before initial setting; the thickness of the cement concrete surface layer should meet the design requirements; no construction joints should be left when laying the cement concrete surface layer; when the construction gap exceeds the allowed time limit, the joints should be treated.

7. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized by: In step 10 to step 12, after the gray surface of the surface layer absorbs water, rub and smooth it with a wooden trowel, mix the dry cement sand mixture with the fine stone concrete slurry, and make the surface layer tightly bonded; the first time of smoothing: use an iron trowel to gently smooth once until the slurry comes out; the second time of smoothing: after the surface mortar has initially set, there are footprints on the surface layer of the ground but it does not sink when you walk on it, use an iron trowel to smooth it for the second time, fill and smooth the pits and sand holes, and be careful not to miss any holes; the third time of smoothing: before the surface mortar is finally set, that is, there are slight footprints when people step on it, and it is smoothed with an iron trowel without any traces, you can use the iron trowel to smooth it for the third time. This time, you need to smooth it hard to flatten and polish all the traces to make the surface layer dense and smooth. The polishing should be completed before the final setting.

8. The method for improving the quality of concrete pouring of civil building floors according to claim 2 is characterized by: In step 13, the surface layer is covered with plastic film and watered for curing 24 hours after it is applied. The curing time is generally at least 7 days. The compressive strength should reach 5MPa before people are allowed to walk on it. It can only be used normally after the compressive strength reaches the design requirements.