A kind of 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, restricting secondary utilization, etc. Effect

Active Publication Date: 2022-05-17
GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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  • 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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  • A kind of preparation method of high-strength concrete

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Effect test

Embodiment 1

[0021] The present embodiment provides a method for preparing high-strength concrete, the preparation method comprising the following steps:

[0022](1) 60 parts by weight of cement, 40 parts of waste concrete, 8 parts of fly ash, 10 parts of modified calcium silicate for mixing and mixing, and drying to obtain the mixture, standby; modified calcium silicate is obtained by the following methods: the rare earth sulfate and absolute ethanol are mixed according to the ratio of 1:2 to the mass ratio, Adjust the pH to 7.5, to obtain a modifier, and then add a modifier with a modifier mass of 0.4 times the calcium silicate powder, placed in the reactor stirred reaction for 1.5h, the reaction conditions are: far infrared irradiation power of 400w, temperature of 40 °C, ultrasonic power of 2000w; after centrifugal separation, the product is dried to obtain modified calcium silicate; waste concrete is mixed with other raw materials before the following pretreatment: the waste concrete is ...

Embodiment 2

[0026] The present embodiment provides a method for preparing high-strength concrete, the preparation method comprising the following steps:

[0027](1) 70 parts by weight of cement, 48 parts of waste concrete, 12 parts of fly ash, 14 parts of modified calcium silicate for mixing and mixing, and drying to obtain a mixture, standby; modified calcium silicate is obtained by the following methods: the rare earth sulfate and absolute ethanol are mixed according to the ratio of 1:2 to mass. Adjust the pH to 7.7, to obtain a modifier, and then add a modifier with a modifier mass of 0.5 times the calcium silicate powder, placed in the reactor stirred reaction for 2.0h, the reaction conditions are: far infrared irradiation power of 425w, temperature of 42 ° C, ultrasonic power of 2400w; after centrifugal separation, the product is dried to obtain modified calcium silicate; waste concrete is mixed with other raw materials before the following pretreatment: the waste concrete is collected,...

Embodiment 3

[0031] The present embodiment provides a method for preparing high-strength concrete, the preparation method comprising the following steps:

[0032](1) 80 parts by weight of cement, 55 parts of waste concrete, 16 parts of fly ash, 18 parts of modified calcium silicate for mixing and mixing, and drying to obtain a mixture, standby; modified calcium silicate is obtained by the following methods: the rare earth sulfate and absolute ethanol are mixed according to the ratio of 1:2 by mass. Adjust the pH to 8.0, to obtain a modifier, and then add a modifier with a modifier mass of 0.6 times the calcium silicate powder, placed in the reactor stirred reaction for 2.5h, the reaction conditions are: far infrared irradiation power of 450w, temperature of 45 °C, ultrasonic power of 2800w; after centrifugal separation, the product is dried to obtain modified calcium silicate; waste concrete is mixed with other raw materials before the following pretreatment: the waste concrete is collected, ...

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Abstract

The invention provides a preparation method of high-strength concrete, which relates to the technical field of construction engineering materials. The concrete is composed of cement, waste concrete, fly ash, modified calcium silicate, basalt fiber, gelling agent, leveling agent and water The high-strength concrete of the present invention obtains a kind of high compressive and tensile strength, good durability and good compactness by treating waste concrete, using waste concrete and cement as main raw materials, and through a series of processing and the action of additives. The high-strength concrete realizes the reuse of waste solids.

Description

【Technical field】 [0001] The present invention relates to the technical field of building engineering materials, specifically to a method for preparing high-strength concrete. 【Background】 [0002] Concrete refers to the collective name of engineering composite materials that are cemented by cementitious materials to aggregate into a whole. Concrete with a strength grade of C60 or above is generally called high-strength concrete. It is the use of cement, sand, stone raw materials plus water reducer or at the same time added fly ash, F ore powder, slag, silicon powder and other mixtures, through the conventional process of production and obtain high strength concrete. As a new building material, high-strength concrete has been widely used in high-rise building structures, large-span bridge structures and some special structures with its advantages of high compressive strength, strong deformation resistance, large density and low porosity. The biggest feature of high-strength conc...

Claims

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Application Information

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Patent Type & AuthorityPatents(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