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Modified building plastering mortar for aerated concrete

A technology of air-entrained concrete and plastering mortar, which is applied in the field of plastering mortar and improved aerated concrete masonry, which can solve the problems of long water absorption, hollowing of plastering layer, poor bonding performance, etc., and shorten the construction period , reduce the process and improve the economic efficiency of the enterprise

Inactive Publication Date: 2013-10-30
NANJING NEW BUILDING MATERIALS DAY CLOUD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, air-entrained concrete has a closed-cell micro-porous structure, long water absorption duration, poor bonding performance with mortar, hollowing and cracking of the plaster layer, which has become a common quality problem in wall plastering projects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Formula: 150kg of cement, 120kg of fly ash, 720kg of fine aggregate, 0.7kg of 40,000-viscosity hydroxypropyl methylcellulose ether, 0.4kg of polycarboxylate high-performance water reducer, 0.35kg of type II anhydrous gypsum, Redispersible latex powder 8kg, wood fiber 0.7kg, pp fiber 0.1kg, GP-SHP50 water repellent 0.9kg. Among them, the cement is ordinary Portland cement P·O 42.5.

[0018] Preparation method: first mix hydroxypropyl methylcellulose ether, high-efficiency water reducer, type II anhydrite, redispersible latex powder, wood fiber, pp fiber and water-repellent agent to obtain mixed small materials, fine aggregate When mixing , cement and fly ash, add the pre-mixed small material and mix evenly.

[0019] Example 1 Mortar performance test results are shown in Table 1.

[0020] Table 1

[0021] project

Ordinary plastering mortar

Embodiment 1 Mortar

Layered degree / mm

19

11

28-day bond strength average / MPa

0.34...

Embodiment 2

[0028] Formula: 180kg of cement, 100kg of fly ash, 710kg of fine aggregate, 0.8kg of 20,000 viscosity hydroxypropyl methylcellulose ether, 0.36kg of polycarboxylate high-performance water reducer, 0.41kg of type II anhydrous gypsum, Redispersible latex powder 10kg, wood fiber 0.6kg, pp fiber 0.08kg, GP-SHP50 water repellent 0.8kg. Among them, the cement is Portland cement P·I 42.5.

[0029] The preparation method is the same as in Example 1.

[0030] Example 2 Mortar performance test results are shown in Table 2.

[0031] Table 2

[0032] project

[0033] Detection standard is the same as embodiment 1.

Embodiment 3

[0035] Formula: 250kg of cement, 70kg of fly ash, 680kg of fine aggregate, 0.5kg of 40,000 viscosity hydroxypropyl methylcellulose ether, 0.32kg of polycarboxylate high-performance water reducer, 0.5kg of type II anhydrous gypsum, Redispersible latex powder 5kg, wood fiber 0.5kg, GP-SHP50 water repellent 0.4kg. Among them, the cement is Portland cement P·II 42.5.

[0036] The preparation method is the same as in Example 1.

[0037] Example 3 Mortar performance test results are shown in Table 3.

[0038] table 3

[0039] project

[0040] Detection standard is the same as embodiment 1.

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Abstract

The invention discloses modified building plastering mortar for aerated concrete. The modified building plastering mortar comprises, by weight, 250-150 parts of cement, 70-120 parts of coal ash, 650-720 parts of fine aggregate, 0.5-0.8 part of hydroxypropyl methyl cellulose, 03-0.4 part of superplasticizer, 0.5-0.2 part of II-type anhydrous gypsum, 5-10 parts of redispersible latex powder, 0.5-1.0 part of wood fiber, 0-0.1 part of PP (polypropylene) fiber, and 0.2-1.0 part of water repellent. The mortar has superior water retention, application property, cohesive property and cracking resistance, and by using the mortar, cost can be evidently reduced, procedures can be reduced, construction period is shortened, and economic benefit is improved for enterprises.

Description

technical field [0001] The invention belongs to the field of mortar production, and in particular relates to an improved aerated concrete masonry and plastering mortar. Background technique [0002] Air-entrained concrete has the characteristics of light weight, good thermal insulation and energy saving. It is a new type of wall material encouraged by the state. However, air-entrained concrete has a closed-cell micro-porous structure, long water absorption duration, poor bonding performance with mortar, hollowing and cracking of the plaster layer, which have become common quality problems in wall plastering projects. [0003] Masonry and plastering mortar for aerated concrete is a new type of wall material specially used for aerated concrete. Because there is a certain difference in the linear expansion and shrinkage of aerated concrete and cement mortar materials, aerated concrete is porous and easy to Water-absorbing materials will quickly absorb the water in the mortar, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 孙德锋顾云华
Owner NANJING NEW BUILDING MATERIALS DAY CLOUD
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