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Dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler

A technology for dry-mixed mortar and waste rock powder, applied in the field of dry-mixed mortar, can solve the problems of difficulty in comprehensive utilization of stone powder resources, and achieve the effects of strong constructability, good environmental protection and ecology, and wide application range

Inactive Publication Date: 2009-09-23
湖北昂富新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the resource utilization of stone powder below 5mm is still a big problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1, a dry-mixed mortar using waste rock powder from a stone mining and processing plant as aggregate and filler, prepared according to the following weight ratio: 0.08mm-5mm waste rock powder 100, 0-0.08mm waste rock powder 3, 42.5 grade ordinary Portland cement 25, Class F fly ash 14, metakaolin 10, calcium hydroxide 4, water retention thickener 1. After this mortar is mixed with water, the consistency is 50mm, the water retention rate is 88%, the 7d strength is 26.8MPa, the 28d strength is 35.0MPa, the impermeability grade is greater than S12, the 28d bond strength is 0.6MPa, and the shrinkage rate is 0.041%.

Embodiment 2

[0029] Example 2, a dry-mixed mortar using waste rock powder from a stone mining and processing plant as aggregate and filler, prepared according to the following weight ratio: 0.08mm-5mm waste rock powder 100, 0-0.08mm waste rock powder 12, 32.5 grade ordinary Portland cement 50, Class C fly ash 9, metakaolin 6, calcium hydroxide 2, water retention thickener 6. After this mortar is mixed with water, the consistency is 110mm, the water retention rate is 90%, the 7d strength is 17.6MPa, the 28d strength is 24.0MPa, the impermeability grade is greater than S10, the 28d bond strength is 0.5MPa, and the shrinkage rate is 0.052%.

Embodiment 3

[0030] Example 3, a dry-mixed mortar using waste rock powder from a stone mining and processing plant as aggregate and filler, prepared according to the following weight ratio: 0.08mm-5mm waste rock powder 100, 0-0.08mm waste rock powder 8, 32.5 grade ordinary Portland cement 40, Class C fly ash 9, metakaolin 10, calcium hydroxide 3, water retention thickener 5. After this mortar is mixed with water, the consistency is 95mm, the water retention rate is 91%, the 7d strength is 12.0MPa, the 28d strength is 19.5MPa, the impermeability grade is greater than S10, the 28d bond strength is 0.5MPa, and the shrinkage rate is 0.048%.

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Abstract

The invention belongs to the technical field of civil engineering material, specifically relates to a dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler. The dry-mixed mortar is composed of 0.08-5mm of waste stone dust, 0-0.08 mm of waste stone dust, cement, fly ash, metakaolin, calcium hydroxide and water holding thickening agent; with the dry-mixed mortar of the invention adopted, the waste stone dust accounting for 55-75% of the weight of the mortar product can be recycled, thus being environmentally friendly and ecologically friendly. The dry-mixed mortar of the invention not only makes good use of waste material but also features good environmental protection; in addition, the mortar features good water retention rate, fine Constructability, high index of strength and durability, low shrinkage factor and certain crack-resistant property. With all the advantages, the product of the invention can be widely applied to plastering, masonry and land disposal of civil engineering projects of all types.

Description

technical field [0001] The invention belongs to the technical field of civil engineering materials, and in particular relates to a dry-mixed mortar using waste rock powder from a stone mining and processing plant as aggregate and filler. Background technique [0002] There are a large number of stone mining and processing enterprises in Fujian, Guangdong, Zhejiang, Shaanxi, Shanxi, Guangxi, Shandong, Xinjiang and other places in my country. After mining and processing a large amount of stone for structural load-bearing and decoration for the national economic construction, these enterprises destroyed the mountain. At the same time, waste solids that are difficult to dispose of are left, that is, a large amount of stone powder. National authorities and local governments urgently must find practical measures to effectively use these stone powders that are causing serious damage to the environment. [0003] The waste rock powder produced by stone mining and processing generall...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/12
CPCC04B2111/34C04B2111/00017C04B28/04C04B2103/46Y02W30/91C04B14/106C04B18/08C04B18/12C04B20/0096C04B22/064C04B40/0608C04B2103/44C04B14/042C04B14/08C04B14/104C04B24/383
Inventor 孙振平肖建庄陈柯柯庞敏郑金飚罗琼
Owner 湖北昂富新型材料有限公司
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