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High-performance basalt fiber reinforced and toughened concrete and preparation method thereof

A basalt fiber and concrete technology, applied in the field of concrete, can solve the problems of insufficient tensile strength and toughness of concrete, affecting the safety and durability of concrete structures, cracking and rapid crack expansion, etc., and achieve the effect of excellent flexural strength

Pending Publication Date: 2022-05-10
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the insufficient tensile strength and toughness of concrete, there are a series of cracking and rapid crack expansion problems in the actual application process, which seriously affects the safety and durability of concrete structures.

Method used

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  • High-performance basalt fiber reinforced and toughened concrete and preparation method thereof
  • High-performance basalt fiber reinforced and toughened concrete and preparation method thereof
  • High-performance basalt fiber reinforced and toughened concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] The present embodiment provides a kind of concrete, and every cubic meter of concrete comprises the following components:

[0053] Basalt fiber 5kg, coarse aggregate 1059kg, fine aggregate 894kg, PI type Portland cement 250kg, fly ash 80kg, polycarboxylate superplasticizer 6kg, water 165kg.

[0054] Present embodiment provides the preparation method of above-mentioned concrete simultaneously, comprises the steps:

[0055] (1) Mix PI type Portland cement, coarse aggregate, fine aggregate and fly ash, stir for 30s until uniform, and obtain mixture I;

[0056] (2) Mix 66.7% polycarboxylate superplasticizer, 50% water and the mixture I, and stir for 60 seconds until uniform, to obtain the mixture II;

[0057] (3) Mix the remaining part of the polycarboxylate superplasticizer, the remaining part of water and the mixture II, and stir for 60 seconds until uniform, to obtain the mixture III;

[0058] (4) Mix the basalt fiber and the mixture III, stir for 180s until uniform, a...

Embodiment 2

[0060] The present embodiment provides a kind of concrete, and every cubic meter of concrete comprises the following components:

[0061] Basalt fiber 10kg, coarse aggregate 1059kg, fine aggregate 894kg, PI type Portland cement 250kg, fly ash 80kg, polycarboxylate superplasticizer 6kg, water 165kg.

[0062] The preparation method of the concrete of this embodiment is the same as embodiment 1.

Embodiment 3

[0064] The present embodiment provides a kind of concrete, and every cubic meter of concrete comprises the following components:

[0065] Basalt fiber 15kg, coarse aggregate 1059kg, fine aggregate 894kg, PI type Portland cement 250kg, fly ash 80kg, polycarboxylate superplasticizer 6kg, water 165kg.

[0066] The preparation method of the concrete of this embodiment is the same as embodiment 1.

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Abstract

The invention relates to concrete, in particular to high-performance basalt fiber reinforced and toughened concrete and a preparation method thereof. The concrete comprises a basalt fiber, a reinforcing agent and a reinforcing agent, the basalt fiber is a fiber bundle composed of basalt fiber monofilaments, the diameter of the fiber bundle is 0.6-0.9 mm, and the length of the fiber bundle is 4-5 cm; the diameter of the basalt fiber monofilament is not less than 5 [mu] m, the elastic modulus is not less than 40 GPa, the tensile strength is not less than 900 MPa, and the density is not less than 2100 kg / m < 3 >; in each cubic meter of concrete, the mixing amount of the basalt fiber is not less than 5kg. The concrete provided by the invention has excellent breaking strength, residual strength after cracking, crack width control capability and toughness, 0.4 < = fR1k / fLk < = 1.5 under the condition of a service limit state, and fR3k / fR1k > 0.5 under the condition of a strength limit state.

Description

technical field [0001] The invention relates to concrete, in particular to a high-performance basalt fiber reinforced and toughened concrete and a preparation method thereof. Background technique [0002] Concrete is composed of cementitious materials, granular aggregates (also known as aggregates), water, and admixtures and admixtures added when necessary, prepared in a certain proportion, uniformly stirred, densely formed, cured and hardened. artificial stone. Concrete is widely used in civil engineering, shipbuilding, machinery industry, marine development, geothermal engineering and other fields because of its high compressive strength, good durability and wide range of compressive strength grades. [0003] However, due to the insufficient tensile strength and toughness of concrete, there are a series of problems of cracking and rapid crack expansion in the actual application process, which seriously affects the safety and durability of concrete structures. [0004] In...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/46
CPCC04B28/04C04B14/4643C04B2201/50C04B14/068C04B14/28C04B14/04C04B18/12C04B18/146C04B18/08C04B2103/302
Inventor 刘艳军王肇嘉徐瑞来韩康
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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