Concrete using granite powder as major mineral admixture

A technology of granite rock powder and mineral admixture, applied in the field of concrete, can solve the problem of low utilization rate of granite rock powder, and achieve the effects of good compatibility, improved workability, and improved compressive strength

Inactive Publication Date: 2015-08-19
福建省建筑材料工业科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low utilization rate of granite stone powder, to provide a concrete with granite stone powder as the main mineral admixture

Method used

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  • Concrete using granite powder as major mineral admixture
  • Concrete using granite powder as major mineral admixture
  • Concrete using granite powder as major mineral admixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Influence of Granite Powder Added in Natural Sand on Concrete Properties

[0026] 1. Test material

[0027] The cement used in the test is P.O42.5 grade stone refining cement, which uses natural river sand and crushed stone with a particle size of 31.5. The granite stone powder is produced during the production process of the stone factory, and the admixture is the high-efficiency pump produced by Xiapu Xinlei New Building Materials. Send agent.

[0028] Table 1 Physical properties of cement

[0029]

[0030] Table 2 Physical properties of granite powder

[0031]

[0032] The composition of table 3 granite stone powder

[0033]

[0034] Table 4 Physical properties of natural sand

[0035]

[0036] Table 5 Physical properties of gravel

[0037]

[0038] Table 6 Performance of high-efficiency pumping agent

[0039]

[0040] 2. Test method

[0041] According to GB / T50080-2002 "General Concrete Mixture Performance Test Method Standard" and GB / T500...

Embodiment 2

[0060] Physical properties of table 10 granite stone powder and fly ash

[0061]

[0062] Table 11 Performance of high performance retarding water reducer

[0063]

[0064] 1. Test method

[0065]According to GB / T50080-2002 "General Concrete Mixture Performance Test Method Standard" and GB / T50081-2002 "Ordinary Concrete Mechanical Performance Test Method Standard" respectively, the working performance and mechanical properties of concrete are measured, and the test mold size is 100mm × 100mm × 100mm.

[0066] Test mix ratio

[0067] Table 12 Test group mix ratio and material consumption kg / m 3

[0068]

[0069] Test group A is cement replaced by fly ash at 35%;

[0070] In the test group B, the cement is replaced by 17.5% of granite stone powder and fly ash;

[0071] Test group C is the remixing of granite stone powder and fly ash when adding additives;

[0072] 2. Test results and discussion

[0073] Table 13 Effect of the addition of granite powder on the ...

Embodiment 3

[0082] Influence test of mixed mixture of granite stone powder and fly ash on the late strength of concrete

[0083] According to GB / T50080-2002 "General Concrete Mixture Performance Test Method Standard" and GB / T50081-2002 "Ordinary Concrete Mechanical Performance Test Method Standard" respectively, the working performance and mechanical properties of concrete are measured, and the test mold size is 100mm × 100mm × 100mm.

[0084] Test mix ratio

[0085] Table 14 Test group mix ratio and material consumption kg / m 3

[0086]

[0087] Test group A 2 Replace cement by 25% for fly ash;

[0088] Test group B 2 Replace cement by 12.5% ​​each for granite stone powder and fly ash;

[0089] Test group C 2 Replace cement with 7.5% and 17.5% of granite powder and fly ash respectively.

[0090] Test Results and Discussion

[0091] Table 15 Effects of compound mixing of granite stone powder and fly ash on the workability of concrete

[0092]

[0093] The test r...

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Abstract

The present invention belongs to the field of concrete preparation, and specifically relates to preparation of a concrete by using granite powder as a major mineral admixture. Granite powder or fly ash is employed to substitute natural sand or cement in the concrete, wherein the substitution rate of granite powder is 5-17.5 wt%, and the substitution rate of fly ash is 0-17.5 wt%, can significantly improve workability and bleeding performance if the fresh concrete, and has good compatibility with additives, so as to benefit the construction of commercial concrete.

Description

technical field [0001] The invention belongs to the field of concrete preparation, in particular to concrete with granite powder as the main mineral admixture. Background technique [0002] The application of mineral admixtures in commercial concrete is a new trend in the development of concrete in recent years. Granulated blast furnace slag, fly ash and silica fume are commonly used mineral admixtures, but there are still many industrial waste materials that have not been fully utilized for a long time, causing environmental pollution and waste of resources, such as cutting granite in Nan'an stone industry stone dust. Nan'an, Quanzhou is the largest stone production base in the country. 83% of the world's stone is processed and re-exported in Nan'an, Quanzhou. Stone processing factories can be seen everywhere here, and white dust can be seen everywhere. Every year, nearly 2.6 million tons of stone processing waste, stone powder, is piled up everywhere, causing a lot of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B14/02
Inventor 苏肇澍黄海涛倪群周鹏
Owner 福建省建筑材料工业科学研究所
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