Waste foundry sand dry-mixed mortar

A technology of dry-mixed mortar and casting mold, which is applied in the field of waste foundry sand dry-mixed mortar, which can solve the problems of abnormal fluctuations in the quality of the mixed mortar, affecting the quality of buildings, and large dust emissions, so as to prevent the occupation of cultivated land and environmental pollution , the protection of the shape of the river and the surrounding environment, and the unified effect of social benefits

Inactive Publication Date: 2012-10-03
秦大春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the progress of society and the accelerated pace of urbanization in our country, and the improvement of people's awareness of environmental protection, there are fatal flaws in the traditional construction site mixing mortar, such as disturbing noise, large dust emissions, and inability to measure the amount of mortar mixed. The quality of mortar fluctuates abnormally, affecting the quality of buildings d, etc.

Method used

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  • Waste foundry sand dry-mixed mortar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Quality ratio:

[0028] Dry waste foundry sand 77%;

[0029] Dry fly ash 6%;

[0030] Cement 17%;

[0031] Water retaining agent 0.3%;

[0032] Waste foundry sand is dried waste foundry sand obtained after multiple harmless treatment processes. Its silicon dioxide content is above 92%, the mud content is less than 1%, and its fineness modulus is M X =1.8 or so, belonging to fine sand.

[0033] Dry fly ash is Class II ash.

[0034] The cement is P.042.5 ordinary Portland cement.

[0035] The water retaining agent is cellulose ether, plus.

[0036] The dry-mixed mortar prepared by mixing and stirring has a design compressive strength of M10, the actual measured 7d compressive strength is 11.0MPa, and the 7d flexural strength is 2.62MPa. It meets the requirements of the national standard GB / T25181 "Ready-mixed Mortar".

Embodiment 2

[0038] Quality ratio:

[0039] Dry waste foundry sand 74%;

[0040] Dry fly ash 6.5%;

[0041] Cement 19.5%;

[0042] Water retaining agent 0.4%.

[0043] Waste foundry sand is dried waste foundry sand obtained after multiple harmless treatment processes. Its silicon dioxide content is above 92%, the mud content is less than 1%, and its fineness modulus is M X =1.8 or so, belonging to fine sand.

[0044] Dry fly ash is Class II ash.

[0045] The cement is P.042.5 ordinary Portland cement.

[0046] The water retaining agent is cellulose ether, plus.

[0047] The dry-mixed mortar prepared by mixing and stirring has a design compressive strength of M15, the actual measured 7d compressive strength is 14.7MPa, and the 7d flexural strength is 3.26MPa. It meets the requirements of the national standard GB / T25181 "Ready-mixed Mortar".

Embodiment 3

[0049] Quality ratio:

[0050] Dry waste foundry sand 71.5%;

[0051] Dry fly ash 5.5%;

[0052] Cement 23%;

[0053] Water retaining agent 0.5%.

[0054] Waste foundry sand is dried waste foundry sand obtained after multiple harmless treatment processes. Its silicon dioxide content is above 92%, the mud content is less than 1%, and its fineness modulus is M X =1.8 or so, belonging to fine sand.

[0055] Dry fly ash is Class II ash.

[0056] The cement is P.042.5 ordinary Portland cement.

[0057] The water retaining agent is cellulose ether, plus.

[0058] The dry-mixed mortar prepared by mixing and stirring has a design compressive strength of M20, the actual tested 7d compressive strength is 20.6MPa, and the 7d flexural strength is 4.24MPa. It meets the requirements of the national standard GB / T25181 "Ready-mixed Mortar".

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Abstract

The invention relates to a waste foundry sand dry-mixed mortar, belonging to the technical field of circular economy and building material mortar. The waste foundry sand dry-mixed mortar is characterized in that the production raw materials of the dry-mixed mortar are based on waste foundry sand with the following mass ratio: 11-31% of cement, 3-7% of dry coal ash, 0-5% of dry lime powder, 50-80% of dry waste foundry sand, 0-20% of yellow sand (with particle diameter between 2.36mm and 1.18mm), and 0.1-0.6% of water retaining agent (additionally added). The varieties of the dry-mixed mortar prepared according to the invention comprise various types of dry-mixed masonry mortar, dry-mixed plastering mortar, dry-mixed terrace mortar and the like which all meet the requirements of national standard GB/T25181 Ready Mixed Mortar. The waste foundry sand dry-mixed mortar is beneficial for the harmless treatment and resource utilization of the waste foundry sand, and opens up a brand-new resource regeneration way of the waste foundry sand.

Description

technical field [0001] The invention relates to the technical field of circular economy and building material mortar, specifically a kind of waste foundry sand that is used as the main raw material in mineral waste, and then mixed with a certain amount of cement, yellow sand with special requirements, dry fly ash, dry lime Powder, water-retaining agent (additional) dry mixed, the main varieties of waste foundry sand dry-mixed mortar produced are: dry-mixed masonry mortar of various labels, dry-mixed plastering mortar, dry-mixed floor mortar, etc. It meets the requirements of the national standard GB / T25181 "Ready-mixed Mortar". Background technique [0002] Since the reform and opening up, my country's foundry industry has developed by leaps and bounds. Hundreds of large, large and medium-sized foundry enterprises across the country discharge tens of millions of tons of waste foundry sand every year, and most of them are disposed of in landfill. It not only encroached on a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 金立虎秦大春
Owner 秦大春
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