Preparation method of high-strength concrete

A concrete and high-strength technology, applied in the field of construction engineering materials, can solve the problems of inability to produce concrete, low concrete strength, and restrictions on secondary utilization, etc., and achieve waste solid reuse, good durability, and high tensile strength. Effect

Active Publication Date: 2021-01-29
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the preparation of existing concrete, when waste concrete is used as raw material, the strength of the prepared concrete is often low, and high-quality concrete cannot be produced, which restricts its secondary utilization. Not only that, if the waste concrete is not Utilization will cause environmental pollution and waste of resources

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  • Preparation method of high-strength concrete

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Effect test

Embodiment 1

[0021] The present embodiment provides a kind of preparation method of high-strength concrete, and this preparation method comprises the following steps:

[0022] (1) Stir and mix the cement of 60 parts by weight, the waste concrete of 40 parts by weight, the fly ash of 8 parts by weight, and the modified calcium silicate of 10 parts by weight, and dry to obtain the mixture for subsequent use; modification Calcium silicate is obtained by the following method: mix rare earth sulfate and absolute ethanol according to the mass ratio of 1:2, adjust the pH to 7.5 to obtain a modifier, and then add 0.4 times the weight of the modifier to the modifier The calcium silicate powder is placed in the reactor and stirred for 1.5h. The reaction conditions are: the far-infrared radiation power is 400w, the temperature is 40°C, and the ultrasonic power is 2000w; after centrifugal separation, the product is dried to obtain modified calcium silicate The waste concrete is pretreated as follows b...

Embodiment 2

[0026] The present embodiment provides a kind of preparation method of high-strength concrete, and this preparation method comprises the following steps:

[0027] (1) Stir and mix the cement of 70 parts by weight, the waste concrete of 48 parts by weight, the fly ash of 12 parts by weight, and the modified calcium silicate of 14 parts by weight, and dry to obtain the mixture for subsequent use; modification Calcium silicate is obtained by the following method: mix rare earth sulfate and absolute ethanol according to the mass ratio of 1:2, adjust the pH to 7.7 to obtain a modifier, and then add 0.5 times the weight of the modifier to the modifier The calcium silicate powder is placed in the reactor and stirred for 2.0 hours. The reaction conditions are: the far-infrared radiation power is 425w, the temperature is 42°C, and the ultrasonic power is 2400w; after centrifugal separation, the product is dried to obtain modified calcium silicate The waste concrete is pretreated as fol...

Embodiment 3

[0031] The present embodiment provides a kind of preparation method of high-strength concrete, and this preparation method comprises the following steps:

[0032] (1) Stir and mix the cement of 80 parts by weight, the waste concrete of 55 parts by weight, the fly ash of 16 parts by weight, and the modified calcium silicate of 18 parts by weight, and dry to obtain the mixture for subsequent use; modification Calcium silicate is obtained by the following method: mix rare earth sulfate and absolute ethanol in a mass ratio of 1:2, adjust the pH to 8.0 to obtain a modifier, and then add 0.6 times the weight of the modifier to the modifier The calcium silicate powder is placed in the reactor and stirred for 2.5 hours. The reaction conditions are: the far-infrared radiation power is 450w, the temperature is 45°C, and the ultrasonic power is 2800w; after centrifugal separation, the product is dried to obtain modified calcium silicate The waste concrete is pretreated as follows before ...

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Abstract

The invention provides a preparation method of high-strength concrete, and relates to the technical field of constructional engineering materials, the concrete is composed of cement, waste concrete, fly ash, modified calcium silicate, basalt fiber, a gelling agent, a leveling agent and water; according to the high-strength concrete disclosed by the invention, the waste concrete is treated, the waste concrete and the cement are used as main raw materials, and the high-strength concrete with high compression resistance, high tensile strength, good durability and good compactness is obtained through a series of processing and the action of additives, so that waste solid recycling is realized.

Description

【Technical field】 [0001] The invention relates to the technical field of construction engineering materials, in particular to a preparation method of high-strength concrete. 【Background technique】 [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally, concrete with a strength grade of C60 and above is called high-strength concrete. It is a high-strength concrete obtained by using cement, sand, stone raw materials plus water reducing agent or fly ash, F slag powder, slag, silica powder and other mixtures at the same time, and produced by conventional technology. As a new building material, high-strength concrete has been widely used in high-rise building structures, long-span bridge structures and some special structures due to its advantages of high compressive strength, strong deformation resistance, high density and low porosity. application. The biggest feature of high-...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/167C04B18/08C04B22/00C04B14/4643C04B14/14C04B18/146C04B24/045C04B24/121C04B24/04C04B22/142C04B24/026Y02W30/91
Inventor朱剑宏唐清文谭耿温文铨郭胜男李光东刘洋蓝群力谢世华
OwnerGUANGXI ROAD & BRIDGE ENG GRP CO LTD