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Lean cemented concrete prepared from aggregate chip iron tailings sand and polycarboxylate water reducer

A technology of iron tailings sand and water reducer, which is applied in the fields of construction raw materials and poor-adhesive concrete, which can solve problems such as environmental pollution and land occupation, and achieve the effects of reducing production costs, reducing water consumption, and ensuring water retention

Inactive Publication Date: 2016-04-13
青岛磊鑫混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Iron ore tailings are the waste produced during the mining and processing of iron ore. Due to the lack of rational use, a large number of tailings are accumulated, occupying land, and causing environmental pollution.

Method used

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  • Lean cemented concrete prepared from aggregate chip iron tailings sand and polycarboxylate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The low-adhesive concrete prepared by using stone chips, iron tailings and polycarboxylate superplasticizer in this embodiment includes the following components in parts by weight: 100 parts of cement, 75 parts of fly ash, and 120 parts of mineral powder; 260 parts of tailings sand, 850 parts of stone chips, 780 parts of gravel, 185 parts of water, 3.8 parts of polycarboxylate superplasticizer; the sand ratio is 0.59;

[0024] The particle size of stone chips is 0.1-2.5mm, the fineness modulus is 3.1, and the mud content is 5%; the particle size of tailings sand is 0.1-5mm, and the fineness modulus is 1.7; the particle size of stones is 5-31.5 mm continuous gradation, mud content 2.4%;

[0025] Polycarboxylate superplasticizer contains 0.5% thickener, thickener contains aggregate thickener, cellulose ether, air-entraining agent, inhibitor of aggregate stone powder adsorption superplasticizer, the superplasticizer mixed with The water reduction rate is 18% when the cont...

Embodiment 2

[0028] The low-adhesive concrete prepared by using stone chips, iron tailings and polycarboxylate superplasticizer in this embodiment includes the following components in parts by weight: 130 parts of cement, 50 parts of fly ash, and 115 parts of mineral powder; 250 parts of tailings sand, 830 parts of stone chips, 790 parts of gravel, 180 parts of water, 3.8 parts of polycarboxylate superplasticizer; sand ratio is 0.58; others are the same as in Example 1.

Embodiment 3

[0030] The low-adhesive concrete prepared by using stone chips, iron tailings and polycarboxylate superplasticizer in this embodiment includes the following components in parts by weight: 110 parts of cement, 65 parts of fly ash, and 120 parts of mineral powder; 280 parts of tailings sand, 840 parts of stone chips, 800 parts of gravel, 175 parts of water, 3.9 parts of polycarboxylate superplasticizer; sand ratio is 0.58; others are the same as in Example 1.

[0031] Table 1 is the performance table of the poor glue material concrete prepared by the embodiment of the present invention

[0032] Table 1

[0033]

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Abstract

The invention relates to lean cemented concrete prepared from aggregate chip iron tailings sand and polycarboxylate water reducer. The concrete is prepared from 100-130 parts of cement, 50-75 parts of fly ash, 115-120 parts of mineral powder, 250-280 parts of tailings sand, 830-850 parts of aggregate chips, 780-800 parts of pebbles, 175-185 parts of water and 3.8-3.9 parts of the polycarboxylate water reducer, wherein the sand ratio ranges from 0.58 to 0.59, the fineness modulus of the aggregate chips is 3.1, the fineness modulus of the tailings sand is 1.7, and the particle size of the pebbles is 5-31.5 mm continuous grading. Commonly-produced aggregate chips and the iron tailings sand are used for replacing machine-made sand and river sand which need to be produced by grinding the pebbles according to grading, production cost is reduced, adaptability of fine aggregate and the polycarboxylate water reducer is improved, and water use amount is reduced. Meanwhile, viscosity of the concrete is improved, good flowability and cohesiveness of the concrete are guaranteed, and adverse influences caused by small amount of cement are reduced.

Description

technical field [0001] The invention relates to a building raw material, in particular to a concrete with poor glue, in particular to a ready-mixed concrete with poor glue prepared by using stone chips, iron tailings and polycarboxylate water reducing agent. Background technique [0002] Ready-mixed concrete is one of the main engineering raw materials in today's building construction. Ready-mixed concrete has the characteristics of abundant raw materials, low price, simple production process, and convenient construction, so its usage is increasing. At the same time, ready-mixed concrete has the characteristics of high compressive strength, stable quality, good durability, convenient construction, environmental protection and sanitation. Ordinary on-site mixing concrete is mixed with cement, river sand, and clear water, and after hardening, it plays the role of bonding building materials together to form a solid whole. [0003] In recent years, with the sustained and rapid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/12C04B18/14C04B24/24
CPCC04B28/04C04B18/12C04B18/142C04B24/24C04B18/08Y02W30/91
Inventor 胡涛胡琳王赛显刘伟民王作峰
Owner 青岛磊鑫混凝土有限公司
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