High-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster and preparation method thereof

The technology of self-leveling mortar and desulfurization gypsum is applied in the field of self-leveling mortar, which can solve the problems of high production cost and energy consumption, and achieve the effects of fast setting and hardening speed, not easy to pulverize, and high flexural and compressive strength.

Inactive Publication Date: 2019-10-18
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Patent CN 103332920 A discloses a desulfurized gypsum mortar, patent CN 103351148 B discloses a desulfurized gypsum block, and patent CN 103113077 B discloses a desulfurized gypsum concrete. These patents can recycle desulfurized gypsum slurry, but desulfurized gypsum The pulp needs to undergo pretreatment processes such as pressing, drying and drying, so that the desulfurization gypsum changes from the state

Method used

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  • High-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster and preparation method thereof

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preparation example Construction

[0031] The preparation method of the high-strength cement-based self-leveling mortar prepared by desulfurized gypsum slurry comprises the following steps:

[0032] 1) Weigh desulfurized gypsum slurry, aluminate cement, ordinary Portland cement, natural quartz sand, water reducer, thickener and appropriate amount of water (tap water or clean river water) according to the formula and mix them in a mortar mixer 3 ~5min to get the initial mortar mixture;

[0033] 2) Conduct a fluidity test on the initial mortar mixture prepared in step 1), so that the initial fluidity and 20min fluidity of the mortar are controlled between 130-150mm. If this requirement cannot be met, the sample should be re-weighed according to the formula. And adjust the amount of water added until the initial fluidity and 20min fluidity of the mortar are between 130-150mm, and record the amount of added water at this time;

[0034]3) Reweigh the desulfurized gypsum slurry, aluminate cement, ordinary Portland c...

Embodiment 1

[0037] Proportion: 18 parts of desulfurized gypsum slurry, 37 parts of aluminate cement, 5 parts of ordinary Portland cement, 39 parts of natural quartz sand, 0.8 parts of water reducer, and 0.01 part of thickener.

[0038] Preparation:

[0039] (1) Weigh desulfurized gypsum slurry, aluminate cement, ordinary Portland cement, natural quartz sand, water reducer, thickener and appropriate amount of water (tap water or clean river water) according to the formula and mix them in the mortar mixer 3 to 5 minutes to obtain the initial mortar mixture;

[0040] (2) Conduct a fluidity test on the initial mortar mixture prepared in step (1), so that the initial fluidity and 20min fluidity of the mortar are controlled between 130 and 150mm. If this requirement cannot be met, it should be weighed again according to the formula and adjust the amount of water added until the initial fluidity and 20min fluidity of the mortar are between 130 and 150mm, and record the amount of added water at ...

Embodiment 2

[0044] Proportion: 21 parts of desulfurized gypsum slurry, 35 parts of aluminate cement, 5 parts of ordinary Portland cement, 38 parts of natural quartz sand, 0.8 parts of water reducing agent, and 0.01 part of thickener.

[0045] Preparation:

[0046] (1) Weigh desulfurized gypsum slurry, aluminate cement, ordinary Portland cement, natural quartz sand, water reducer, thickener and appropriate amount of water (tap water or clean river water) according to the formula and mix them in the mortar mixer 3 to 5 minutes to obtain the initial mortar mixture;

[0047] (2) Conduct a fluidity test on the initial mortar mixture prepared in step (1), so that the initial fluidity and 20min fluidity of the mortar are controlled between 130 and 150mm. If this requirement cannot be met, it should be weighed again according to the formula and adjust the amount of water added until the initial fluidity and 20min fluidity of the mortar are between 130 and 150mm, and record the amount of added wa...

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Abstract

The invention discloses a high-strength cement-based self-leveling mortar prepared by desulfurization calcium plaster, and belongs to the technical field of self-leveling mortar. The high-strength cement-based self-leveling mortar prepared by desulfurization calcium plasteris prepared from the following raw materials in parts by weight: 18 to 28 parts of desulfurized calcium plaster, 30 to 37 parts of aluminate cement, 5 to 6 parts of Portland cement, 35 to 39 parts of natural siliceous sand, 0.7 to 0.8 part of water reducing agent, and 0.01 part of thickener. The invention further discloses apreparation method of thehigh-strength cement-based self-leveling mortar prepared by the desulfurization calcium plaster. According to the high-strength cement-based self-leveling mortar prepared bythe desulfurization calcium plaster and the preparation method thereof, the performance characteristics of the desulfurized calcium plaster, high-alumina cement, and the ordinary Portland cement are fully utilized respectively, the prepared cement-based self-leveling mortar has the characteristics that the setting and hardening speeds are fast, fracture resistance and crush resistanceof early andlater periods are high, wear resistance is good,the surface is not prone to being pulverized, and impact performance is good; the plasterin the desulfurized calcium plaster is not subjected to treating processes such as pressure filtration and drying, so that the dispersion effect of the desulfurized plasterin cement slurry is better, the production cost is lowered, new approaches are provided forpreparation of cement-based self-leveling mortar and resource utilization of desulfurizedcalcium plaster,and economic and environmental benefits are good.

Description

technical field [0001] The invention belongs to the technical field of self-leveling mortar, in particular to high-strength cement-based self-leveling mortar prepared from desulfurized gypsum slurry and a preparation method thereof. Background technique [0002] Cement-based self-leveling mortar is composed of cement-based cementitious materials, fine aggregates, fillers and additives. It is a ground material that can flow and level after being mixed with water (or emulsion) or can be flowed and leveled with a little auxiliary paving. [0003] Cement-based self-leveling mortar is widely used in industrial plants because of its good leveling performance, high early strength, good wear resistance, easy laying, fast construction speed, short construction period, dual functions of bearing and decoration, and promising development prospects. , workshops, warehousing, commercial stores, exhibition halls, gymnasiums, hospitals, various open spaces and ground projects for offices. ...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/62
CPCC04B28/06C04B2111/62C04B7/02C04B14/06C04B18/064C04B2103/302C04B2103/44
Inventor 徐风广徐璐吴其胜侯海军蒋金科
Owner YANCHENG INST OF TECH
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