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Thick-layer self-leveling mortar

A self-leveling mortar and sand technology, applied in the field of mortar, can solve the problems of self-leveling mortar hydration shrinkage cracking, large pouring thickness, uneven hydration, etc., and achieve the effect of improving surface effect, increasing early strength, and increasing fluidity

Inactive Publication Date: 2018-02-16
苏州赛璐泰科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the large pouring thickness, the volume is large, and it is easy to cause uneven hydration, which leads to hydration shrinkage and cracking of the self-leveling mortar. Gypsum, using anhydrite and cement hydration expansion to compensate for the shrinkage of cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 Composition of a kind of thick layer self-leveling mortar

[0021] 371kg of cement; 156kg of sulfur-aluminum cement; 48kg of anhydrite; 425kg of sand; 1.15kg of water reducing agent; 0.63kg of HPMC; 0.0025kg of air-entraining agent; kg; sodium gluconate 0.15kg; tartaric acid 0.55kg; lime calcium 14kg.

Embodiment 2

[0022] Embodiment 2 selects the optimal ratio of magnesium aluminum silicate

[0023] a. Taking Example 1 as an example, change the ratio of magnesium aluminum silicate to study the influence of different dosages of magnesium aluminum silicate on the fluidity of thick layer self-leveling mortar

[0024] Table 1 Influence of magnesium aluminum silicate content on fluidity

[0025]

[0026] It can be clearly seen from Table 1 that with the increase of the amount of inorganic thickener magnesium aluminum silicate, the fluidity does not decrease or increase, so magnesium aluminum silicate has no obvious effect on the fluidity of self-leveling mortar. Influence; And the present invention has studied the effect of inorganic thickener magnesium aluminum silicate on the surface of self-leveling mortar as can be seen obviously, inorganic thickener magnesium aluminum silicate has significant effect for improving the surface of thick layer self-leveling mortar, when When the dosage i...

Embodiment 3

[0030] Example 3 Effect of different retarding components on the performance of thick self-leveling mortar

[0031] This embodiment is based on the composition of thick-layer self-leveling mortar in Example 1, changing the ratio of sodium gluconate and tartaric acid to study the influence of different retarding components on the performance of thick-layer self-leveling mortar.

[0032] When sodium gluconate is used alone as a retarder, the effect is not very obvious. It is usually used in combination with other retarders. At the same time, sodium gluconate also has a certain water-reducing effect. Under the circumstances, the fluidity of the mortar can be improved. Therefore, when compounding with tartaric acid, it is appropriate to reduce the total amount of retarder to 0.70% to prevent bleeding and segregation. Because sodium gluconate is more sensitive to the influence of fluidity, therefore, the content of sodium gluconate is gradually increased by 0.05% until completely ...

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Abstract

The invention discloses thick-layer self-leveling mortar including a cementing material, sand and an addition agent; the mortar conforms to a dry mixed self-leveling mortar having the self-leveling mortar standard strength of C25; the mortar cannot secrete water and cannot be isolated when the pouring thickness is 4 cm, can be leveled by self, has the advantages of good surface effect and low costand has economic benefits.

Description

technical field [0001] The invention belongs to the field of mortar, in particular to a thick-layer self-leveling mortar. Background technique [0002] Now with the needs of the development of the self-leveling market, thick-layer self-leveling cement mortar has become a trend and has been rapidly promoted. The construction thickness of thick self-leveling cement mortar is between 5mm and 50mm. It is composed of cement-based or anhydrite-based cementitious materials, fine aggregates, fillers and additives. After being stirred with water (or emulsion), it has fluidity and is a ground material that can be leveled automatically or can be leveled with a little paving. The main problem that thick-layer self-leveling mortar is facing now is that due to the excessive thickness to be poured, it is easy to cause bleeding and segregation while maintaining a high degree of fluidity, and the early strength requirements for thick-layer self-leveling mortar are relatively high . At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B7/02C04B22/143C04B14/06C04B2103/302C04B24/383C04B2103/304C04B2103/50C04B22/00C04B2103/0068C04B24/10C04B24/06C04B22/064
Inventor 王平张小伟
Owner 苏州赛璐泰科化工有限公司
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