Mass concrete and preparation method thereof

A technology of mass concrete and machine-made sand, which is applied in the field of concrete preparation to achieve the effect of shortening the transmission path, reducing the temperature difference and enhancing the thermal conductivity

Active Publication Date: 2022-07-29
XIAN COAL CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to reduce the problem that mass concrete is prone to cracks, this application provides a mass concrete and its preparation method

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0046] A mass concrete is made from the following raw materials by weight:

[0047] 27kg of cement, 85kg of machine-made sand, 95kg of crushed stone, 12kg of fly ash, 5.0kg of mineral powder, 1.0kg of water reducing agent, 2.0kg of thermally conductive silica gel powder, 1.5kg of lithium carbonate solution and 15kg of water; the particle size of thermally conductive silica gel powder is 20um; The lithium carbonate solution is a saturated solution at a temperature of 25°C, and the mass fraction of the lithium carbonate solution is 25.7%.

[0048] Mass concrete is prepared by the following steps:

[0049] S1: Mix cement, machine-made sand, crushed stone, fly ash, mineral powder, thermally conductive silica gel powder and water, and stir for 30s to obtain a ready-mixed mixture;

[0050] S2: Mix the water reducing agent, the lithium carbonate solution and the ready-mixed mixture, and stir for 90s to obtain mass concrete.

Embodiment 2

[0052] A mass concrete is made from the following raw materials by weight:

[0053] 30kg of cement, 89kg of machine-made sand, 93kg of crushed stone, 11kg of fly ash, 4.0kg of mineral powder, 0.9kg of water reducing agent, 2.3kg of thermally conductive silica gel powder, 1.8kg of lithium sulfate solution and 16kg of water; the particle size of thermally conductive silica gel powder is 35um; The lithium sulfate solution is a saturated solution at a temperature of 25°C, and the mass fraction of the lithium sulfate solution is 25.7%.

[0054] Mass concrete is prepared by the following steps:

[0055] S1: Mix cement, machine-made sand, crushed stone, fly ash, mineral powder, thermally conductive silica gel powder and water, and stir for 45s to obtain a ready-mixed mixture;

[0056] S2: Mix the water reducing agent, the lithium sulfate solution and the ready-mixed mixture, and stir for 80s to obtain mass concrete.

Embodiment 3

[0058] A mass concrete is made from the following raw materials by weight:

[0059] 32kg of cement, 92kg of machine-made sand, 90kg of crushed stone, 10kg of fly ash, 3.0kg of mineral powder, 0.8kg of water reducing agent, 2.5kg of thermally conductive silica gel powder, 2.0kg of lithium carbonate solution and 18kg of water; the particle size of thermally conductive silica gel powder is 50um; The lithium carbonate solution is a saturated solution at a temperature of 25°C, and the mass fraction of the lithium carbonate solution is 25.7%.

[0060] Mass concrete is prepared by the following steps:

[0061] S1: Mix cement, machine-made sand, crushed stone, fly ash, mineral powder, thermally conductive silica gel powder and water, and stir for 60s to obtain a ready-mixed mixture;

[0062] S2: Mix the water reducing agent, the lithium carbonate solution and the ready-mixed mixture, and stir for 60s to obtain mass concrete.

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Abstract

The invention relates to the technical field of concrete preparation, and particularly discloses mass concrete and a preparation method thereof. The mass concrete is prepared from the following components: cement, machine-made sand, broken stones, fly ash, mineral powder, a water reducing agent, heat-conducting silica gel powder, a crystallization solution, water, ammonium bicarbonate powder and sepiolite fibers. The preparation method comprises the following steps: S1, mixing the cement, the machine-made sand, the gravel, the fly ash, the mineral powder, the heat-conducting silica gel powder and the water, and stirring for 30-60 seconds to obtain a premixed mixture; and S2, mixing the water reducing agent, the crystallization solution and the premixed mixture, and stirring for 60-90 seconds to obtain the mass concrete. The mass concrete can quickly transfer heat generated inside the concrete to the outer surface of the concrete, so that the temperature difference inside and outside the concrete is reduced, and the problem that the concrete is prone to cracking due to temperature stress is solved.

Description

technical field [0001] The present application relates to the field of concrete preparation technology, more particularly, it relates to a mass concrete and its preparation method. Background technique [0002] Mass concrete refers to mass concrete with a minimum geometric dimension of concrete structures of not less than 1 m, or concrete that is expected to cause harmful cracks due to temperature changes and shrinkage caused by hydration of the cementitious material in the concrete. Mass concrete is often used in the construction of high-rise building foundations, large-scale equipment foundations, and water conservancy dams. [0003] The related art such as the application document with the application number of 200910025167.2 discloses a C50 mass concrete, which is composed of the following raw materials by weight: 300 parts of cement, 1,100 parts of crushed stone, 620 parts of sand, 180 parts of water, and 200 parts of ground slag. parts, 7 parts of admixture SPA. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06C04B22/10C04B22/14
CPCC04B28/00C04B14/062C04B22/10C04B22/147C04B14/06C04B18/12C04B18/08C04B2103/302Y02W30/91
Inventor 任雪艳刘政王凯
Owner XIAN COAL CONSTR ENG
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