Composite cementitious material and ground self-leveling mortar using same

A technology of composite cementitious materials and self-leveling mortar, which is applied in the field of composite cementitious materials, self-leveling mortar, and ground self-leveling mortar, can solve the problems of accelerated setting time of composite cement, reduced early strength, and low production energy consumption, and achieves Excellent repair performance, low shrinkage rate, and the effect of solving the problem of large fluidity loss

Active Publication Date: 2009-10-14
广东龙湖科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1970s, China invented sulfoaluminate cement, which contains a large amount of calcium sulfoaluminate (C 4 A 3 ) minerals, the cement has the characteristics of early strength, high strength, low alkalinity and low production energy consumption; but many experiments have proved that when sulfoalu...

Method used

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  • Composite cementitious material and ground self-leveling mortar using same
  • Composite cementitious material and ground self-leveling mortar using same
  • Composite cementitious material and ground self-leveling mortar using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Surface self-leveling formula

[0035] Sulphoaluminate cement 300.00Kg

[0036] Portland cement (42.5R) 126.00Kg

[0037] Quartz sand (100-120 mesh) 461.50Kg

[0038] Anhydrite (fineness ≥ 200) 65.00Kg

[0039] Redispersible latex powder 40.00Kg

[0040] Tartaric acid 0.50Kg

[0041] Lithium carbonate 2.00Kg

[0042] German BASF 2651 Superplasticizer 1.50Kg

[0043] American strukto12289 defoamer 2.00Kg

[0044] German BASF 3003F stabilizer 1.50Kg

[0045] Total 1000Kg

[0046] 2. Performance test

[0047] The self-leveling performance of the obtained surface layer is as follows: fluidity 142mm, operating time greater than 40min, compressive strength 43.5MPa, shrinkage rate 0.034%, tensile bond strength 1.49MPa, wear resistance 0.38g.

Embodiment 2

[0049] 1. Bottom self-leveling formula

[0050] Sulphoaluminate cement 165.00Kg

[0051] Portland cement (42.5R) 50.00Kg

[0052] Refined river sand (50-80 mesh) 668.40Kg

[0053] Anhydrite (fineness ≥ 200) 85.00Kg

[0054] Redispersible latex powder 20.00Kg

[0055] Tartaric acid 0.80Kg

[0056] Lithium carbonate 2.00Kg

[0057] Casein 6.00Kg

[0058] American strukto12289 defoamer 2.00Kg

[0059] German tylose H300P2 stabilizer 0.80Kg

[0060] Total 1000.00Kg

[0061] 2. Performance test

[0062] Add materials and mix according to the above weight percentage, add water and stir according to the water-cement ratio of 26%, and then construct. Junction strength 1.1MPa, wear resistance 0.46g.

Embodiment 3

[0064] 1. Color surface self-leveling formula

[0065] Sulphoaluminate cement 280.00Kg

[0066] Portland cement (42.5R) 50.00Kg

[0067] Refined river sand (100-120 mesh) 522.50Kg

[0068] ∝ type hemihydrate gypsum (fineness ≥ 200) 70.00Kg

[0069] German waker redispersible latex powder 5011N 50.00Kg

[0070] Tartaric acid 0.50Kg

[0071] Lithium carbonate 2.00Kg

[0072] German BASF 2651 Superplasticizer 2.00Kg

[0073] American strukto12289 defoamer 2.00Kg

[0074] German BASF 3003F stabilizer 1.00Kg

[0075] Pigment 20.00Kg

[0076] Total 1000.00Kg

[0077] 2. Performance test

[0078] Add materials according to the above weight percentage, add water and stir according to the water-cement ratio of 23%, and then construct. The self-leveling performance of the obtained colored surface layer is: fluidity 137mm, operating time greater than 40min, compressive strength 39.5MPa, shrinkage rate 0.023%, tensile strength The tensile bonding strength is 1.54MPa, and the ab...

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Abstract

The invention provides a ground self-leveling mortar comprising gelatinization materials, fine sand and an additive. The gelatinization materials comprise sulphate aluminium cement, silicate cement and plaster. The self-leveling mortar comprises the components by weight percentage of: 30% of sulphate aluminium cement, 12.6% of silicate cement, 46.15% of fine sand, and 4.75% of additive. The plaster is a natural hard plaster or reverse 8-type hymihydrate plaster. The additive comprises: redisperse emulsion powder, early strength agent, a retarder, a super-plasticizer, a defoamer and a stabilizer. The ground self-leveling mortar uses the sulphate aluminium cement to replace aluminate cement to be combined with the silicate cement and the plaster, so as to solve the problems that the aluminate cement is high in price and difficult to purchase, and overcome the contradiction between shrinkage and expansion, thus avoiding the self-leveling floor hollowing and cracking and ensuring the bonding strength, folding and compressingresistance strength as well as wearing resistance to reach the optimized level.

Description

technical field [0001] The invention relates to a cementitious material, in particular to a composite cementitious material with cement and gypsum as cementing materials. The present invention also relates to a self-leveling mortar, and more specifically relates to a ground self-leveling mortar using the composite gelling material. Background technique [0002] The cementitious material is a material that can change from a slurry to a solid stone-like body under physical and chemical actions, and can cement other materials to form a composite solid with certain mechanical strength. Portland cement is the most important cementitious material for construction in the world today. Its clinker is composed of tricalcium silicate (C 3 S) Based on minerals, Portland cement has the advantages of abundant raw material reserves, low production costs, and mature production processes. However, Portland cement has long setting time, low early strength, large shrinkage rate and poor dura...

Claims

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Application Information

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IPC IPC(8): C04B11/00C04B28/36C04B14/06
CPCC04B28/06C04B7/02C04B7/32C04B14/06C04B2103/0057C04B2103/0082C04B2103/14C04B2103/22C04B2103/32C04B2103/50C04B2103/54
Inventor 姜伟基张铬洪永顺梁洪
Owner 广东龙湖科技股份有限公司
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