Early-strength type gypsum-based thick-layer leveling mortar

A leveling mortar and gypsum-based technology, which is applied in the field of leveling mortar, can solve the problems of slow strength development, easy cracking, hollowing, and powdering on the surface, and achieve good wear resistance and water resistance, improve water resistance, and high fluidity. Effect

Pending Publication Date: 2018-07-31
江苏兆佳建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the leveling mortar commonly used in engineering is mainly cement-based ground mortar, but the cement-based ground mortar has problems such as slow strength development, poor fluidity, surface powdering, easy cracking and hollowing, etc., which directly lead to unstable project quality and cannot reach Architectural design standards; in addition, although the shrinkage of gypsum-based screed mortar is low, it has not been widely used due to its shortcomings such as water resistance, wear resistance, and easy segregation and bleeding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An early-strength type gypsum-based thick layer leveling mortar, the mass percentage of its components is as follows:

[0028] Gypsum 30%

[0029] Hydraulic binder 0%

[0030] Stimulant 1%

[0031] Filler 67%

[0032] Admixture 2%

[0033] Among them, the admixture is redispersible latex powder, superplasticizer, water retaining agent, retarder, anti-segregation agent and defoamer, and the mass percentage of each component in the leveling mortar is: redispersible latex powder 1.3%; Plasticizer 0.35%; water retaining agent 0.1%; retarder 0.1%; anti-segregation agent 0.05%; defoamer 0.1%.

[0034] Further, the gypsum is one or more of β-hemihydrate gypsum, α-hemihydrate gypsum and anhydrite, which can be combined arbitrarily. Prepared.

[0035] Further, the activator is calcium hydroxide.

[0036] Further, the filler is composed of powdery filler and granular filler, the ratio of powdery filler to granular filler is (0:1)~(1:0), and the powdery filler is ground cal...

Embodiment 2

[0044] An early-strength type gypsum-based thick layer leveling mortar, the mass percentage of its components is as follows:

[0045] Gypsum 40%

[0046] Hydraulic binder 5%

[0047] Stimulant 0%

[0048] Filler 51%

[0049] Admixture 4%

[0050] The admixtures are redispersible latex powder, superplasticizer, water retaining agent, retarder, anti-segregation agent, defoamer, and their dosages are: redispersible latex powder 3%; superplasticizer 0.4%; water retaining agent 0.2%; retarder 0.15%; anti-segregation agent 0.05%; defoamer 0.2%.

[0051] Further, the hydraulic cementitious material is a mixture of white Portland cement and sulphoaluminate cement.

[0052] Further, gypsum is a mixture of one or more of β-hemihydrate gypsum, α-hemihydrate gypsum and anhydrite, and can be combined arbitrarily. Gypsum is prepared.

[0053] Further, the filler is composed of powdery filler and granular filler, the ratio of powdery filler to granular filler is (0:1)~(1:0), and the p...

Embodiment 3

[0061] An early-strength type gypsum-based thick layer leveling mortar, the mass percentage of its components is as follows:

[0062] Gypsum 40%

[0063] Hydraulic cementitious material 10%

[0064] Stimulant 5%

[0065] Filler 40%

[0066] Admixture 5%

[0067] The admixture is redispersible latex powder, superplasticizer, water retention agent, retarder, anti-segregation agent, defoamer, and its dosage is respectively: redispersible latex powder 4%; superplasticizer 0.5%; water retaining agent 0.1%; retarder 0.2%; anti-segregation agent 0%; defoamer 0.2%.

[0068] Further, the hydraulic cementitious material is a mixture of ordinary Portland cement and sulphoaluminate cement.

[0069] Further, the gypsum is one or more of β-hemihydrate gypsum, α-hemihydrate gypsum and anhydrite, which can be combined arbitrarily. Prepared.

[0070] Further, the activator is a mixture of sodium silicate, potassium hydroxide, calcium hydroxide, mineral powder, silica fume, and fly ash. ...

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Abstract

The invention discloses early-strength type gypsum-based thick-layer leveling mortar. The early-strength type gypsum-based thick-layer leveling mortar is prepared from the following components in percent by mass: 10-40% of gypsum, 0-10% of hydraulic cementitious material, 0-5% of excitant, 40-80.75% of filler and 0.25-5% of additive, wherein the additive is prepared from the following components in percent by mass: 0-3% of redispersible latex powder, 0.05-0.5% of super plasticizer, 0-0.2% of water-retaining agent, 0.05-0.2% of retarder, 0-0.1% of segregation-resistant agent and 0.01-0.2% of defoaming agent. All the components are mixed uniformly according to the mass percents and are packaged into bags. The early-strength type gypsum-based thick-layer leveling mortar disclosed by the invention has the advantages of early strength, no shrinkage, wear resistance, water resistance, good constructability, segregation and bleeding resistance, low cost and no harmful chemical substances.

Description

technical field [0001] The invention relates to a leveling mortar, in particular to an early-strength gypsum-based thick layer leveling mortar. Background technique [0002] Gypsum-based thick layer leveling mortar is a powdery material that is pre-mixed in a factory with gypsum, hydraulic cementitious material, activator, optimally graded aggregates and additives in an appropriate proportion. When using it, just add water and stir it to become a self-leveling early-strength gypsum-based thick-layer leveling mortar with uniformity and suitable consistency that can meet the construction requirements. [0003] At present, the leveling mortar commonly used in engineering is mainly cement-based ground mortar, but the cement-based ground mortar has problems such as slow strength development, poor fluidity, surface powdering, easy cracking and hollowing, etc., which directly lead to unstable project quality and cannot reach Architectural design standards; in addition, although th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/62C04B2201/50C04B11/00C04B14/042C04B14/106C04B14/06C04B14/104C04B24/26C04B24/38C04B24/42C04B24/32C04B24/08C04B24/14C04B22/143C04B24/06C04B22/08C04B24/383C04B2103/32C04B14/064C04B7/32C04B22/064C04B12/04C04B18/141C04B18/146C04B18/08C04B22/062
Inventor 张超王辉钱建男蔡文龙
Owner 江苏兆佳建材科技有限公司
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