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Lightweight bottom layer plastering gypsum

A technology for plastering gypsum and bottom layer, applied in the field of plastering gypsum, can solve the problems of empty drum cracking of cement mortar, high on-site repair rate, irregular construction, etc., to reduce self-weight, reduce emission and accumulation, and improve water retention and construction performance. Effect

Inactive Publication Date: 2015-04-08
上海每天生态科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is that the cement used in the existing gypsum is a hydraulically brittle shrinkage material with poor water retention, and the quality problem of hollowing and cracking of the cement mortar is easy to occur, which is more likely to occur when the construction is not standardized, resulting in on-site repairs high rate problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 50% calcined gypsum, 45% bottom ash, and 5% cement by weight percentage, add 2‰ cellulose ether, 1.2‰ retarder and 0.6‰ amylase according to the total weight of the aforementioned materials; The production process is fully stirred and mixed to obtain the light-weight bottom plastering gypsum described in the present invention. Its specific performance parameters are shown in Table 1. According to the water consumption of 52%, it was stirred and mixed with post-molding to prepare test specimens.

[0028] Table 1

[0029] performance parameter

[0030] Dry flexural strength

Embodiment 2

[0032] Weigh 45% gypsum, 45% bottom ash, 5% cement, and 5% fly ash by weight percentage, add 1.5‰ cellulose ether and 1.2‰ retarder according to the total weight of the aforementioned materials; The production process is fully stirred and mixed to obtain the light-weight bottom plastering gypsum described in the present invention. Its specific performance parameters are shown in performance parameter table 2, according to the water consumption of 50% stirring and mixing and post-molding to prepare test specimens.

[0033] Table 2

[0034] performance parameter

Embodiment 3

[0036] Take by weight 50% gypsum, 45% bottom ash, 5% cement, add 2‰ cellulose ether, 1.2‰ retarder, 0.6‰ amylase, 1‰ water reducer according to the total weight of the aforementioned materials; The raw materials are fully stirred and mixed according to the dry powder mortar production process to be worthy of the light bottom plastering gypsum described in the present invention. Its specific performance parameters are shown in performance parameter table 3, according to 40% of the water consumption, stirring and mixing and post-molding to prepare test specimens.

[0037] table 3

[0038] performance parameter

[0039] final setting time

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PUM

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Abstract

The invention discloses a lightweight bottom layer plastering gypsum which is characterized by comprising the following components in percentage by weight: 20-70% of building gypsum, 20-70% of furnace bottom ash serving as a lightweight aggregate, 0-20% of ordinary portland cement, 0-20% of granulated blast furnace slag powder, 0-30% of fly ash and 0-30% of an additive, wherein the additive comprises the following components in percentage by weight: 0-0.6% of cellulose ether, 0-0.3% of a retarder, 0-0.3% of a water reducing agent, 0-0.15% of starch ether, 0-2% of re-dispersible latex powder, 0-0.5% of polypropylene fiber and 0-2% of a water repellent. The invention provides an environment-friendly lightweight bottom layer plastering gypsum mortar which is low in density, good in heat retaining property and capable of automatically adjusting temperature and humidity. The lightweight bottom layer plastering gypsum can effectively reduce the mortar density and building dead weight and has good sound insulation and noise reduction effects.

Description

technical field [0001] The invention relates to a plastering gypsum, in particular to an environment-friendly light bottom plastering gypsum mortar with low density, good thermal insulation properties and temperature and humidity adjustment, belonging to the field of plastering gypsum. Background technique [0002] With the technological progress of the construction industry and the improvement of civilized construction requirements, the on-site mixed mortar has increasingly shown its inherent defects, such as unstable quality, large waste of materials, single variety, low degree of civilized construction, and environmental pollution. The ready-mixed mortar is produced by professional manufacturers, and strict quality control process is adopted to ensure the quality of the produced mortar. In the early 1950s, European countries began to mass-produce and use ready-mixed mortar, and it has a development history of more than 50 years. Ready-mixed mortar can improve the constru...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/06
CPCY02W30/91
Inventor 李涛方爱华
Owner 上海每天生态科技发展有限公司
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