Regenerated c35 synthetic fiber concrete from waste fired bricks and its preparation method

A technology for discarding sintered bricks and synthetic fibers, which is applied in the field of building materials, can solve the problems that the improvement and improvement of concrete mechanical properties and durability are not very obvious, and the crushing index is high, and achieves reasonable utilization, good water retention performance, and preparation. Simple process effect

Active Publication Date: 2018-06-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are relatively many studies on synthetic fiber recycled concrete, but they mainly focus on waste concrete coarse aggregate and fine synthetic fiber. The research features are as follows: (1) waste concrete aggregate is mainly composed of natural aggregate Composed of cement mortar, the crushing index is relatively high, which is not much different from that of natural coarse aggregate, so the strength of the recycled concrete prepared is relatively high, and the preparation process and technical requirements are relatively simple; (2) The fiber is generally a synthetic fiber with a small diameter and short length. Its main function is to prevent cracking and reduce shrinkage of concrete, and the improvement and improvement of the mechanical properties and durability of concrete are not very obvious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A recycled C35 synthetic fiber concrete from waste fired bricks, which is prepared by cement, synthetic fiber, recycled coarse aggregate from waste fired bricks, fine aggregate, water and water reducing agent at a mass ratio of 1:0.011:1.679:0.653:0.397:0.006 become.

[0028] The cement is P.O 42.5 ordinary Portland cement.

[0029] The synthetic fibers are wavy polyolefin thick fibers with a diameter of 0.60 mm to 0.80 mm, a length of 40 to 60 mm, and a tensile strength of 530 to 560 N / mm 2 , the elastic modulus is 6.5-7.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .

[0030] The bulk density of the waste sintered brick regenerated coarse aggregate is 1611 kg / m 3 , the crushing index is 31.8%, the water absorption rate is 30%, and the particle size is d 1 Mass distribution: 5 mm≤d 1 ≤10mm is 22%, 10mm1 ≤16mm is 30%, 16mm1 ≤20 mm is 26%, 20 mm1 ≤25 mm is 22%.

[0031] The fine aggregate is river sand with an apparent density of 2527 kg / m 3 , moisture conten...

Embodiment 2

[0035] The principle of this embodiment is basically the same as that of Embodiment 1, and will not be repeated. The difference is that the synthetic fiber is a continuously scored polyolefin thick fiber with a diameter of 0.70 mm to 0.90 mm, a length of 50 mm to 70 mm, and a tensile strength of 50 mm to 70 mm. 580~630 N / mm 2, the elastic modulus is 9.5-10.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .

[0036] According to GB / T50080-2002 "General Concrete Mixture Performance Test Method Standard", the working performance of the synthetic fiber concrete of the present invention was tested, and the obtained C35 synthetic fiber concrete had a slump of 90 mm.

Embodiment 3

[0038] A recycled C35 synthetic fiber concrete from waste fired bricks, which is prepared by cement, synthetic fiber, recycled coarse aggregate from waste fired bricks, fine aggregate, water and water reducing agent at a mass ratio of 1:0.013:1.695:0.693:0.389:0.007 become.

[0039] The cement is P.O 42.5 ordinary Portland cement.

[0040] The synthetic fibers are wavy polyolefin thick fibers with a diameter of 0.60 mm to 0.80 mm, a length of 40 to 60 mm, and a tensile strength of 530 to 560 N / mm 2 , the elastic modulus is 6.5-7.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .

[0041] The bulk density of the waste sintered brick regenerated coarse aggregate is 1632 kg / m 3 , the crushing index is 30.1%, the water absorption rate is 26%, and the particle size is d 1 Mass distribution: 5 mm≤d 1 ≤10mm is 25%, 10mm1 ≤16mm is 28%, 16mm1 ≤20 mm is 25%, 20 mm1 ≤25 mm is 22%.

[0042] The fine aggregate is machine-made sand with an apparent density of 2570 kg / m 3 , moisture...

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Abstract

The invention relates to waste sintered brick regenerated C35 synthetic fiber concrete which is prepared from cement, synthetic fibers, waste sintered brick regenerated coarse aggregate and fine aggregate, water and a water reducer in a weight ratio of 1: (0.011-0.018): (1.679-1.737): (0.653-0.817): (0.367-0.397): (0.006-0.010). The synthetic fiber concrete prepared by the invention is good in peaceability, mobility and water retaining property and high in compressive strength and splitting tensile strength and the preparation process of the concrete is simple, environment-friendly and easy to construct.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to recycled C35 synthetic fiber concrete from waste sintered bricks and a preparation method thereof. Background technique [0002] With the continuous acceleration of my country's urbanization process, the continuous deepening of new rural construction and the successive rollout of old city renovations, a large number of urban and rural houses have been demolished, and the waste of broken bricks and tiles has increased unprecedentedly. my country currently has about 400×10 9 m 3 Buildings will gradually be transformed into construction solid waste in the next 100 years; in the past 50 years, my country has produced at least 200×10 9 m 3 Clay brick products; these clay brick products will also be transformed into construction solid waste in the next 50 years. At present, the total amount of construction waste piled up in my country has reached 70×10 9 t, the constructio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B16/06C04B18/16
CPCY02W30/91
Inventor 高丹盈景嘉骅周潇左祥祥
Owner ZHENGZHOU UNIV
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