CN104261762A

CN104261762A - Hydraulic concrete made of mineral waste admixture

Info

Publication number: CN104261762A
Application number: CN201410484770.8A
Authority: CN
Inventors: 刘福胜; 张坤强; 赵井辉; 林聪�
Original assignee: Shandong Agricultural University
Current assignee: Shandong Agricultural University
Priority date: 2014-09-21
Filing date: 2014-09-21
Publication date: 2015-01-07

Abstract

The invention discloses hydraulic concrete made of a mineral waste admixture. The hydraulic concrete made of the mineral waste admixture comprises granite stone powder concrete, fly ash concrete and double-doped (mountain flour and fly ash double-doped) concrete, and belongs to the field of hydraulic materials. The hydraulic concrete is a novel hydraulic concrete material. The reasonable single mixing amount and double mixing amount are determined; the problem that the hydraulic engineering concrete structure in the winter cold region in northern China easily cracks and generates frost heaves in winter can be effectively solved; the chlorine ion erosion resistance of the hydraulic concrete can also be effectively improved; and the problems of occupation of land resources and environmental pollution caused by the fact that granite powder and fly ash are stacked in a large quantity can be fully solved; therefore, the hydraulic concrete has relatively wide popularization and application prospects under the general background of vigorously promoting water conservancy construction in China.

Description

Mineral waste adulterant concrete for hydraulic structure

(1) technical field

The present invention relates to the concrete of hydro project, belong to field of constructional engineering material.

(2) background technology

Along with the fast development of Chinese society economy, the contradiction of water scarcity, Constructing Water-saved Society, Development of Water-Saving Irrigation is imperative.China's major part hydro project is built in the sixties in last century five, along with the increase of hydraulic structure working life, due to the impervious ability of concrete for hydraulic structure, frost heaving resistant destructiveness, the crack resistance reason such as poor relative to corrosion resistance of chloride ion ability, serious and the crack of the seepage of part hydraulic structure is caused to be grown wild, and then increase water resources loss amount, add maintenance cost, shorten work-ing life, the military service performance of hydraulic structure is declined greatly.So building up concrete for hydraulic structure engineering is the effective measure reducing hydro project water loss, improve water application efficiency.The serviceability of concrete itself, mechanical property and the military service performance of endurance quality to hydraulic structure play key effect.

In China Middle Eastern, many factories, in the process of exploitation, processing stone material, can produce a large amount of stone flours; Take coal dust as the thermal power plant of fuel and concentrated supply of heating in the city boiler be the main source that flyash produces.These solid waste are not used appropriately, and take a large amount of land resources, cause severe contamination to environment.Effectively utilize so how to take appropriate measures that these trade wastes improve concrete antiseepage, freeze proof and chlorion erosion-resisting characteristics is a problem demanding prompt solution.

(3) summary of the invention

For solving the problem, the invention provides a kind of novel concrete for hydraulic structure, concrete for raising performance is combined with utilizing trade waste.By the two volume of rational stone powder mixing quantity, doping quantity of fly ash and stone flour and flyash, improve concrete impervious, freeze proof and chloride resisting properties on the one hand, can be good at again reducing waste stone powder and flyash on the other hand to the negative impact of environment.

The present invention is achieved through the following technical solutions: this novel water conservancy project mix proportion, by reasonably determining many group experimental programs and carrying out the resistance to compression of concrete sample, freeze proof, impervious and corrosion resistance of chloride ion test, the experimental data obtained is carried out vertical lateral comparison, finally determines that the weight percent number of each raw material of this invention is: cement 10%-15%; Mineral waste (granite stone powder, flyash and the mixture of the two) 1%-5%; Sand 30%-35%; Rubble 45%-50%; Water 5%-10%; Water reducer 0.01%-0.1%.Under this proportioning, the over-all properties of concrete impervious, frost resistance and corrosion resistance of chloride ion is best, and reaches saving cement consumption, makes full use of the object of granite stone powder and flyash.

(4) embodiment

The embodiment of this invention is: first cement, sand, rubble, granite stone powder, flyash, water reducer to be joined and than (each raw materials by weight number adds) according to of the present invention before construction:

Embodiment 1 granite stone powder concrete for hydraulic structure

Cement: 42.5 grades of ordinary Portland cements, weight percent is 10%-15%;

Sand: medium sand, fineness modulus 2.67, complies with the national standard requirements, and weight percent is 30%-35%;

Rubble: particle diameter is the continuous grading rubble of 5mm ~ 20mm, complies with the national standard requirements, weight percent is 45%-50%;

Granite stone powder: particle diameter 1 μm ~ 150 μm, weight percent is 1%-5%;

Water: tap water, weight percent is 5%-10%;

Water reducer: comply with the national standard requirements, weight percent is 0.01%-0.1%.

Embodiment 2 flyash concrete for hydraulic structure

Cement: 42.5 grades of ordinary Portland cements, weight percent is 10%-15%;

Flyash: three grades of ashes, weight percent is 1%-5%;

Water: tap water, weight percent is 5%-10%;

Embodiment 3 waste is two mixes concrete for hydraulic structure

Cement: 42.5 grades of ordinary Portland cements, weight percent is 10%-15%;

Mineral waste is two to be mixed: granite stone powder is mixed by quality 1:1 pair with flyash, and the per-cent that the gross weight of granite stone powder and flyash accounts for concrete material gross weight is 1%-5%;

Water: tap water, weight percent is 5%-10%;

Stir with stirrer, then carry out the construction of hydro project.Form of construction work can adopt cast in situs form, or adopts preformed patterns: large-scale water conservancy channel suggestion adopts the form of precast slab; The suggestion of small water conservancy channel adopts the form of prefabricated U-shaped channel.

The present invention well solves that the structure of the impervious concrete that the northern area of China instantly generally uses is easy to crack, winter the problem such as frost heave, decrease water resources loss amount, reduce engineering maintenance cost, extend engineering work-ing life.

Claims

1. a mineral waste adulterant concrete for hydraulic structure, coordinated by cement, mineral waste, sand, rubble, water and water reducer and form, it is characterized in that each composition by weight percentage: cement 10%-15%, mineral waste 1%-5%, sand 30%-35%, rubble 45%-50%, water 5%-10%, water reducer 0.01%-0.1%.

2. a kind of mineral waste adulterant concrete for hydraulic structure according to claims 1, it is characterized in that, cement is 42.5 grades of ordinary Portland cements; Mineral waste is granite stone powder and flyash, when mixing granite stone powder, adopts fineness to be 1 μm ~ 150 μm; When fly ash, adopt three grades of ashes; Stone flour and flyash are two when mixing, the two etc. quality is two mixes; Sand is medium sand, fineness modulus 2.67; Ballast grain sizes is the continuous grading rubble of 5mm ~ 20mm; Water is tap water; Water reducer is market qualified product.