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High-strength high-crack-resistance anti-impact-wear concrete adopting basalt excavated materials as aggregates and preparation method of same

A basalt and concrete technology, applied in the field of concrete engineering, can solve the problems of wasting rock and mineral resources, occupying construction sites, etc., and achieve the effects of avoiding difficult construction, high strength growth, and excellent material combination

Active Publication Date: 2021-01-22
CHINA THREE GORGES PROJECTS DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-strength, high-crack and abrasion-resistant concrete using basalt excavation materials as aggregates and a preparation method thereof. The material combination of Portland cement + high-quality grade I fly ash with high content not only solves the problem of occupying the construction site and wasting rock and mineral resources by piling up excavated materials in hydropower project caverns, but also economically and effectively Solve the contradiction between high strength and high crack resistance of hydraulic anti-scouring concrete

Method used

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  • High-strength high-crack-resistance anti-impact-wear concrete adopting basalt excavated materials as aggregates and preparation method of same
  • High-strength high-crack-resistance anti-impact-wear concrete adopting basalt excavated materials as aggregates and preparation method of same
  • High-strength high-crack-resistance anti-impact-wear concrete adopting basalt excavated materials as aggregates and preparation method of same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The projects involved are as follows:

[0036] The design label of the bottom plate concrete of the flood discharge tunnel of a certain hydropower station is C 9060F150W10 anti-scouring concrete is continuously loaded into the warehouse by a distributing machine for construction on site. Based on this, the design slump of the concrete is determined to be 70mm-90mm, the air content is 3.0%-4.0%, and the secondary aggregate is selected. The water-binder ratio of 0.33 and 20 % Fly ash content, 32% sand rate mix ratio parameters Carry out concrete mixture performance test, determine its construction mix ratio is - water: cement: fly ash: sand: crushed stone: water reducer: air entraining agent =121:294:73:659:1400:2.936:0.033 (kg / m 3 ).

[0037] According to the above-mentioned engineering design situation, a kind of high-strength and high-crack-resistant anti-abrasion concrete is required, and the concrete includes the following components by weight:

[0038] 294 parts ...

Embodiment 2

[0046] The projects involved are as follows:

[0047] The design label of the concrete surface layer of the pad pond floor of a hydropower station is C 90 50F150W8 anti-scouring concrete is constructed on site by hanging tanks into the warehouse and sliding formwork. Based on this, the design slump of the concrete is determined to be 90mm-110mm, the air content is 3.5%-4.0%, and the secondary aggregate is selected to be 0.38 water-cement ratio and 25%. Fly ash content, 34% sand rate mix ratio parameters Carry out concrete mixture performance test, determine its construction mix ratio as - water: cement: fly ash: sand: stone: water reducer: air entraining agent = 126 :249:83:694:1346:2.321:0.027(kg / m 3 ).

[0048] According to the above-mentioned engineering design situation, a kind of high-strength and high-crack-resistant anti-abrasion concrete is required, and the concrete includes the following components by weight:

[0049] 249 parts by weight of low-heat Portland cemen...

Embodiment 3

[0057] The projects involved are as follows:

[0058] The design label of the inner layer concrete of the pad pond floor of a hydropower station is C 90 50F150W8 anti-scouring concrete is constructed on site by hanging tanks into the warehouse and sliding formwork. Based on this, the design slump of the concrete is determined to be 50mm-70mm, the air content is 3.0%-3.5%, and the three-grade aggregate is selected. The water-binder ratio of 0.38 and 25% are selected. Fly ash content, 30% sand rate mix ratio parameters Carry out concrete mixture performance test, determine its construction mix ratio is - water: cement: fly ash: sand: stone: water reducer: air entraining agent = 110 :246:43:629:1469:2.026:0.023(kg / m 3 ).

[0059] According to the above-mentioned engineering design situation, a kind of high-strength and high-crack-resistant anti-abrasion concrete is required, and the concrete includes the following components by weight:

[0060] 246 parts by weight of low-heat ...

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Abstract

The invention discloses high-strength, high-crack-resistance and abrasion-resistance concrete adopting basalt excavated materials as aggregates. The concrete comprises the following components in parts by weight: 246-294 parts of low-heat Portland cement, 43-83 parts by weight of I-grade fly ash; 629-694 parts by weight of artificial sand produced from a basalt excavation material; 1346-1469 partsby weight of broken stone produced from a basalt excavation material; 110-126 parts by weight of water; 2.026-2.936 parts by weight of a retarding type polycarboxylic acid high-performance water reducing agent; and 0.023-0.033 part by weight of an air entraining agent. According to the high-strength, high-crack-resistance and anti-impact-wear concrete adopting the basalt excavation material as the aggregate and the preparation method thereof, the problems that the construction site is occupied and rock mineral resources are wasted due to stacking of the excavation material of a water-power engineering cavern are solved; and the contradiction between high strength and high crack resistance of the hydraulic anti-abrasion concrete is economically and effectively solved from the aspect of mixproportion design.

Description

technical field [0001] The invention relates to concrete engineering fields such as hydraulic engineering, construction, transportation, energy, etc., in particular to a high-strength, high-crack-resistant and anti-abrasion concrete using basalt excavation materials as aggregates and a preparation method thereof. Background technique [0002] The discharge structures of water conservancy and hydropower projects are important buildings related to the safe operation of hydropower projects. The discharge structures include spillway tunnels, spillways, water cushion ponds, stilling pools, etc., and the flow rate of some discharge structures can reach 40m / s~50m / s, single hole discharge up to 4000m 3 / s, due to the large discharge volume, fast flow velocity, and high sand content, the phenomenon of high-speed water erosion and cavitation damage to the concrete on the overflow surface often occurs, so high-strength anti-abrasion concrete is generally used. High-strength anti-abra...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20
CPCC04B28/04C04B2201/50C04B2111/2038C04B18/08C04B14/14C04B20/0076C04B2103/302C04B2103/304
Inventor 孙明伦刘战鳌王玮王孝海李将伟
Owner CHINA THREE GORGES PROJECTS DEV CO LTD
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