Impact-resistant basalt fiber reinforced concrete and preparation method thereof

A technology of basalt fiber and reinforced concrete, applied in the field of building materials, can solve the problems of low strength of ordinary concrete, and achieve the effects of outstanding frost resistance, increased impact damage load, and excellent impact resistance.

Inactive Publication Date: 2020-07-24
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a kind of impact-resistant basalt fiber reinforced concrete and its preparation method, to solve the problem of low strength of ordinary concrete, greatly improve the performance of concrete, so that the concrete has high flexural strength, durable sexual characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of the above-mentioned impact-resistant basalt fiber reinforced concrete comprises the following steps:

[0036] Select basalt fibers with a length of 5-30mm, screen out coarse and fine aggregates with particle sizes that meet the requirements according to parts by weight, and mix cement, mineral admixtures, fine aggregates, and coarse aggregates in proportion, and the stirring speed is 50-100r / min, stir for 3-5min, add fiber evenly while stirring, continue to stir for 3-5min, after completing the above steps, add the formula amount of water into the mixer evenly, continue to stir for 3-5min, pour into the mold to form, and the formed test piece The formwork is removed after being placed for at least 24 hours, followed by standard curing for 28-30 days to obtain the impact-resistant basalt fiber reinforced concrete.

Embodiment 1

[0039] This example provides an impact-resistant basalt fiber reinforced concrete, and its specific formula (by weight) is shown in Table 1.

[0040] Table 1

[0041] components water cement fine aggregate Coarse aggregate fly ash Basalt fiber formula 400 200 560 860 84 2

[0042] The preparation method of above-mentioned anti-impact basalt fiber concrete comprises the following steps:

[0043] Chopped basalt fibers with a length of 5-30mm are selected, coarse aggregate with a suitable particle size of 5-25mm and fine aggregate with a fineness modulus of 2.9 are selected;

[0044] Add the coarse and fine aggregate, fly ash and cement to the concrete mixer in order according to the weight parts in Table 1, the stirring speed is 60r / min, and stir at a constant speed for 3min;

[0045]Afterwards, add basalt fiber evenly, and continue to stir at the same speed for 3 minutes; then add the prescribed amount of water into the mixer evenly and sti...

Embodiment 2

[0047] This example provides an impact-resistant basalt fiber reinforced concrete, and its specific formula (by weight) is shown in Table 2.

[0048] Table 2

[0049] components water cement fine aggregate Coarse aggregate fly ash Basalt fiber formula 600 300 840 1290 126 3

[0050] The preparation method of above-mentioned anti-impact basalt fiber concrete comprises the following steps:

[0051] Chopped basalt fibers with a length of 5-30 mm are selected, coarse aggregates with a suitable particle size of 5-25 mmd and fine aggregates with a fineness modulus of 2.9 are selected;

[0052] Add the coarse and fine aggregate, fly ash and cement to the concrete mixer according to the weight parts in Table 2, the stirring speed is 70r / min, and stir at a constant speed for 3min;

[0053] Evenly add basalt fiber and continue to stir at the same speed for 3 minutes; then add the formulated amount of water evenly into the mixer and stir for 4 minute...

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Abstract

The invention relates to impact-resistant basalt fiber reinforced concrete and a preparation method thereof. The impact-resistant basalt fiber reinforced concrete comprises the following components inparts by weight: 400-800 parts of cement, 80-170 parts of a mineral admixture; 500-1200 parts of fine aggregate; 90-1800 parts of coarse aggregate; 2-4 parts of basalt fiber; and 200-400 parts of water. According to the impact-resistant basalt fiber reinforced concrete, the basalt fiber has excellent impact resistance, and the impact failure load is higher than that of common concrete. The relative dynamic elastic modulus and the mass loss rate are obviously controlled under the condition of multiple freezing and thawing, the anti-freezing performance is outstanding, and the concrete has important significance in the fields of port deep wharfs, cross-sea bridges and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an impact-resistant basalt fiber reinforced concrete and a preparation method thereof. Background technique [0002] In recent years, the research on concrete fracture mechanics has become an important topic in the research of concrete science in my country. Most buildings and infrastructures use concrete materials. There are many disadvantages, such as heavy weight, low tensile strength, and poor impact resistance. Even reinforced concrete is prone to brittle fracture under impact loads. [0003] Usually, fibers need to be added in the preparation of concrete to inhibit the expansion of cracks in concrete, prevent concrete from shrinking, and improve the toughness of concrete. At present, the fibers commonly used in concrete mainly include steel fibers, polypropylene fibers, and glass fibers. Steel fibers have a high elastic modulus and are suitable for l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B28/04C04B14/46C04B111/20
CPCC04B14/4643C04B28/04C04B28/06C04B2111/20C04B2201/50C04B7/02C04B18/08C04B18/142C04B14/068C04B14/06C04B14/04C04B18/12
Inventor 刘润清邓永刚赵硕李瑶赵荥棵
Owner SHENYANG LIGONG UNIV
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