Machine-made sand C30 pumping concrete and preparation method thereof

A technology for pumping concrete and machine-made sand, applied in the field of concrete, can solve the problems that affect the workability and fluidity of concrete, the machine-made sand has rough particle surface, and cannot be stored stably for a long time, and achieves remarkable economic and ecological benefits. The effect of reducing over-reliance and mining, improving work performance

Inactive Publication Date: 2019-09-27
海南华盛混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem with most machine-made sand-made concrete is that machine-made sand has the characteristics of rough particle surface, sharp polygons, large fineness modulus, poor gradation and high dust content, which makes the mixed concrete more effective than natural sand mixed concrete. Large water volume, poor fluidity, prone to severe bleeding and segregation problems during pumping
The countermeasure to solve the problem is to add admixtures and special superplasticizer double penetration technology to improve the viscosity of ultra-high-strength concrete. Although adding mineral admixtures or air-entraining agents can reduce the segregation tendency, the use of mineral admixtures will affect the concrete. Workability and fluidity, resulting in incapable of long-term stable storage

Method used

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  • Machine-made sand C30 pumping concrete and preparation method thereof
  • Machine-made sand C30 pumping concrete and preparation method thereof
  • Machine-made sand C30 pumping concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A machine-made sand C30 pumping concrete, by weight, the preparation of each cubic concrete includes the following weight raw materials: P.O42.5 cement 200kg, fly ash 50kg, water 100kg, machine-made sand 800kg, gravel 900kg, mud embryo 100kg, 8 kg of water reducing agent, 32 kg of rare earth porcelain sand, 10 kg of composite tackifier; the composite tackifier is airgel, hydrogenated rosin resin, and copper fine powder with a mass ratio of 1:1:2.1;

[0024] The fly ash is Class F Class II;

[0025] The water is drinking water;

[0026] The machine-made sand is sand in Zone II with a fineness of 2.3;

[0027] The minimum section size of the gravel is 5mm;

[0028] The water reducer is HN-2000 polycarboxylate high performance water reducer

Embodiment 2

[0030] A machine-made sand C30 pumping concrete, by weight, the preparation of each cubic concrete includes the following weight raw materials: P.O42.5 cement 300kg, fly ash 90kg, water 180kg, machine-made sand 1000kg, gravel 1200kg, mud embryo 200kg, 10kg of water reducing agent, 50kg of rare earth porcelain sand, and 18kg of composite tackifier; the composite tackifier is airgel, hydrogenated rosin resin, and copper fine powder with a mass ratio of 1:3:5;

[0031] The fly ash is Class F Class II;

[0032] The water is drinking water;

[0033] The machine-made sand is sand in Zone II with a fineness of 3;

[0034] The minimum section size of the gravel is 31.5mm;

[0035] The water reducer is HN-2000 polycarboxylate high performance water reducer.

Embodiment 3

[0037] A machine-made sand C30 pumping concrete, by weight, the preparation of each cubic concrete includes the following weight raw materials: P.O42.5 cement 280kg, fly ash 70kg, water 170kg, machine-made sand 912kg, gravel 1000kg, mud embryo 150kg, 9kg of water reducing agent, 40kg of rare earth porcelain sand, 15kg of composite tackifier; the composite tackifier is airgel, hydrogenated rosin resin, and copper fine powder with a mass ratio of 1:2:3.8;

[0038] The fly ash is Class F Class II;

[0039] The water is drinking water;

[0040] The machine-made sand is sand in Zone II with a fineness of 2.8;

[0041] The minimum section size of the gravel is 19mm;

[0042] The water reducer is HN-2000 polycarboxylate high performance water reducer

[0043] The preparation method of the machine-made sand C30 pumping concrete of the above-mentioned embodiments 1-3 comprises the following steps:

[0044] S1. Dissolve the hydrogenated rosin resin and aerogel in an ethanol solution...

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Abstract

The invention provides machine-made sand C30 pumping concrete and a preparation method thereof. The concrete is prepared in parts by weight. One cubic meter of concrete is prepared from the following components in parts by weight: 200-300 kg of P.O 42.5, 50-90 kg of fly ash, 100-180 kg of water, 800-1000 kg of machine-made sand, 900-1200 kg of broken stones, 100-200 kg of a mud blank, 8-10 kg of a water reducing agent, 32-50 kg of rare earth porcelain sand and 10-18 kg of a compound thickener. The concrete prepared with a formula provided by the invention has the advantages of strong strength, good peaceability, strong fluidity and bleeding segregation.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to machine-made sand C30 pumping concrete and a preparation method thereof. Background technique [0002] With the increasing scale of urbanization and reconstruction in our country, the demand for concrete in large-scale new city construction and old city renovation is increasing. With the improvement of the construction industry's requirements for building materials, the use of high-strength concrete has increased, and the requirements for the strength and work performance of high-strength concrete have increased accordingly. When designing the mix ratio of high-strength concrete, the amount of cementitious materials is large, especially cement, and the requirements for other cementitious materials are also relatively high. [0003] The problem with most machine-made sand-made concrete is that machine-made sand has the characteristics of rough particle surface, sharp polygons, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/08C04B14/06C04B14/02C04B2103/302C04B18/02C04B2103/44
Inventor 刘兴刘兴平周飞
Owner 海南华盛混凝土有限公司
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