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Large-doping-amount slag powder dry mixing mortar using desulphurization gypsum as excitant

A technology for desulfurized gypsum and dry-mixed mortar is applied in the field of building materials, which can solve the problems of low reactivity of slag powder, low early strength of mortar, and inability to adapt well, and achieves excellent workability and construction, easy to popularize, Inexpensive effect

Inactive Publication Date: 2009-01-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively low reactivity of slag powder, the prepared mortar has low early strength and cannot well adapt to the existing construction technology and meet various construction requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, a large amount of slag powder dry-mixed mortar using desulfurized gypsum as an activator, the ratio by weight is: cement 100, slag powder 300, desulfurized gypsum 20, lime 2.4, sodium sulfate 4, cellulose ether 3.6, The ratio of styrene-butadiene latex powder 12 and sand 1200 is prepared. After adding water and mixing the obtained mortar, when the amount of water added is 200, the consistency is 90mm, the water retention rate is 88%, the strength of 7d is 30.8MPa, the strength of 28d is 42.2MPa, and the impermeability grade is higher than S14.

Embodiment 2

[0032] Example 2, a large amount of slag powder dry-mixed mortar using desulfurized gypsum as an activator, the ratio by weight is: cement 100, slag powder 300, desulfurized gypsum 40, lime 4, cellulose ether 4.8, styrene-butadiene latex powder 20 to 1200 sand ratio. After adding water and mixing the obtained mortar, when the amount of water added is 225, the consistency is 96mm, the water retention rate is 92%, the strength of 7d is 29.8MPa, the strength of 28d is 43.2MPa, and the impermeability grade is higher than S14.

Embodiment 3

[0033] Example 3, a large amount of slag powder dry-mixed mortar using desulfurized gypsum as an activator, the ratio by weight is: cement 100, slag powder 400, desulfurized gypsum 25, sodium sulfate 6.5, cellulose ether 7.5, styrene-butadiene latex The ratio of powder 15 and sand 2025 is prepared. After adding water and mixing, when the amount of water added is 250, the consistency is 100mm, the water retention rate is 92%, the strength of 7d is 32.4MPa, the strength of 28d is 43.8MPa, and the impermeability grade is higher than S14.

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Abstract

The invention belongs to the technical field of a constructional material, in particular to slag powder dry mortar which is mixed in large quantity with desulfuration plaster as an excitant. The slag powder dry mortar consists of cement, powdered slag, desulfuration plaster, lime, sodium sulfate, cellulose ether, emulsion powder and sand. By using the slag powder dry mortar, the solid waste, namely desulfuration plaster, is used efficiently as a resource. In addition, under the circumstance of not reducing the properties of mortar, the problem that the early strength of mortar is low because of large quantity of slag powder mixed. The slag powder dry mortar is applicable for plastering and masonry of ordinary buildings, and can meet the waterproof requirement.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a large-volume slag powder dry-mixed mortar using desulfurized gypsum as an activator. Background technique [0002] In order to speed up the energy saving and emission reduction of my country's construction industry and promote the construction of a harmonious society, since 2000, Shanghai, my country has started the research and trial production application of commercial mortar. During this process, it was found that compared with traditional mortar, commercial mortar has great advantages in terms of ease of construction, strength, durability, construction progress, labor intensity, resource and energy saving, and environmental protection. Subsequently, my country's Beijing, Guangzhou, Shenzhen and other cities successively promoted the production and use of commercial mortar. On June 6, 2007, six ministries and commissions including the Ministry of Comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/12C04B22/14C04B24/38
CPCC04B28/144Y02W30/91C04B7/02C04B14/06C04B18/141C04B22/064C04B22/147C04B24/2676C04B24/383C04B40/0608
Inventor 孙振平庞敏
Owner TONGJI UNIV
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