Mass concrete and preparation method thereof

A large-volume concrete and porous carrier technology, applied in the field of concrete, can solve the problems of reducing the bearing capacity of engineering structures, affecting the durability of structures, and the large temperature difference between the inside and outside of concrete, so as to reduce the possibility of micro-cracks, less shrinkage cracks, and reduce The effect of cement dosage

Active Publication Date: 2021-08-17
襄阳嘉众和建材实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for mass concrete, due to the high heat of hydration, the temperature difference between the inside and outside of the concrete is large, and cracks are easily generated. These cracks will reduce the original bearing capacity of the engineering structure and seriously affect the durability of the structure.

Method used

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  • Mass concrete and preparation method thereof
  • Mass concrete and preparation method thereof
  • Mass concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0047] A preparation method of high-strength porous carrier-superabsorbent resin particles, comprising the following steps:

[0048] S1. Weigh 10 kg of super absorbent particles and 50 kg of high-strength porous carrier, put them into a mixer and stir for 3 minutes, and use a 16-mesh screen to screen the stirred mixture of high-strength porous carrier and super-absorbent particles to obtain the remaining high-strength porous carrier;

[0049] S2. Put the remaining high-strength porous carrier into a reservoir filled with sufficient normal temperature water for soaking until the water level in the reservoir is stable, remove the high-strength porous carrier, and use an air separator to perform air separation to obtain High-strength porous carrier-superabsorbent resin particles.

[0050] Among them, the high-strength porous carrier is open-pore ceramic balls, the particle size of the open-pore ceramic balls is 15-25mm, and the pore diameter of the open-pore ceramic balls is 1mm;...

preparation example 2

[0052] A method for preparing high-strength porous carrier-superabsorbent resin particles, the difference from Preparation Example 1 is that before step S2, the remaining high-strength porous carrier obtained in step S1 is wax-sealed, and in step S2, in the reservoir The water temperature is 60°C. Wax sealing includes the following steps:

[0053] Put the sieved high-strength porous carrier into a heating tank filled with 60°C liquid paraffin, take it out after the liquid paraffin is cooled and solidified, put the taken out solidified paraffin into a crusher for extrusion and crushing, so that it is wrapped with high-strength porous The large solidified paraffin of the carrier is divided into small pieces, and then the small pieces of paraffin are put into a vibrating sieve machine for vibratory screening, and the paraffin adhered to the surface of the high-strength porous carrier is vibrated to obtain a high-strength porous carrier with paraffin wax sealing.

preparation example 3

[0055] A method for preparing high-strength porous carrier-superabsorbent resin particles, the difference from Preparation Example 2 is that the superabsorbent resin is an acrylic polymer superabsorbent resin.

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Abstract

The invention relates to the field of concrete, and particularly discloses mass concrete as well as a preparation method and application thereof. The mass concrete is prepared from the following raw materials in parts by weight: 340-355 parts of cement; 40 to 45 parts of fly ash; 100 to 110 parts of mineral powder; 680 to 720 parts of fine aggregate; 1080 to 1100 parts of coarse aggregate; 7-9 parts of a water reducing agent; and 135 to 145 parts of water. The preparation method comprises the following steps: weighing the cement, the fly ash, the mineral powder, the fine aggregate and the coarse aggregate in proportion, and uniformly mixing and stirring to obtain a first mixture; and weighing the water reducing agent and the water according to the proportion, adding the weighed water reducing agent into the water, uniformly mixing, adding the water doped with the water reducing agent into the first mixture, and uniformly stirring to obtain the mass concrete. The mass concrete has the advantages that the crack generation probability is reduced, and the crack generation amount is reduced.

Description

technical field [0001] The present application relates to the field of concrete, and more specifically, it relates to a mass concrete and a preparation method thereof. Background technique [0002] In the construction process of hydraulic structures such as bridges, it is first necessary to carry out the supporting layout and construction of the pile foundation, that is, the cap, and such caps often have a large structural size, especially for the main cable tower foundation cap, which not only has a large structural size, but also Moreover, the requirements for the strength grade of the cap concrete are also relatively high. However, for mass concrete, due to the high heat of hydration, the temperature difference between the inside and outside of the concrete is large, and cracks are easily generated. These cracks will reduce the original bearing capacity of the engineering structure and seriously affect the durability of the structure. [0003] At the same time, since bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/34C04B111/94
CPCC04B28/04C04B2201/50C04B2111/343C04B2111/94C04B2111/20C04B18/08C04B18/141C04B14/06C04B2103/302C04B18/027C04B24/26Y02W30/91
Inventor 黄珊陈磊黄俊孙亚文张玉李兴元任家伟王伟袁和平黄锐张雪亮
Owner 襄阳嘉众和建材实业有限公司
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