Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modified fiber toughened cement-based material and preparation method thereof

A technology of cement-based materials and modified fibers, which is applied in the field of building materials, can solve the problems of high-toughness cement-based materials attenuation of mechanical properties, brittle cracking, etc., and achieve good slip-pullout effect, attenuation improvement, crack resistance and The effect of improving toughness

Inactive Publication Date: 2016-07-20
WUHAN UNIV OF TECH
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of the above-mentioned prior art, solve the problem of brittle cracking of traditional cement-based materials, further improve the toughness of existing high-toughness cement-based materials and reduce the attenuation of mechanical properties of high-toughness cement-based materials, the present invention provides a modified Fiber toughened cement-based material and preparation method thereof

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Modified fiber toughened cement-based material and preparation method thereof
  • Modified fiber toughened cement-based material and preparation method thereof
  • Modified fiber toughened cement-based material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a modified fiber toughened cement-based material, comprising the following steps: 1). Soak the toughened fiber in an acidic film-forming substance dilution, filter the liquid after 15 minutes, and place it in an environment of 65°C After drying for 20 minutes, rinse and disperse with water and then dry to obtain modified toughened fibers;

[0030] 2). Preparation of toughened cement-based material slurry:

[0031] ① Selection of raw materials: cement, admixture, sand, water, water reducing agent, thickener in parts by mass: 25 parts of cement, 20 parts of admixture, 30 parts of sand, 15 parts of water, 0.1 part of water reducing agent , 0.05 part of thickening agent, choose cement, admixture, sand, water, water reducer and thickening agent, for subsequent use; Step 1) the addition of the modified toughening fiber obtained is 2% of the total volume of the above-mentioned materials, Select modified toughening fiber;

[0032] ②After uniformly mixin...

Embodiment 2

[0041] Embodiment 2 (to domestic fiber modification):

[0042] A method for preparing a modified fiber toughened cement-based material, comprising the following steps: 1). Soak the toughened fiber in an acidic film-forming substance dilution, and after 0.5 min, filter the liquid and place it in an environment of 30°C After drying for 2 hours, rinse and disperse with water and then dry to obtain modified toughened fibers;

[0043] 2). Preparation of toughened cement-based material slurry:

[0044] ① Raw material selection: cement, admixture, sand, water, water reducer, thickener in parts by mass: 20 parts of cement, 10 parts of admixture, 20 parts of sand, 10 parts of water, 0.6 part of water reducer , 0.1 part of thickening agent, select cement, admixture, sand, water and water reducer, standby; Step 1) the addition of the modified toughening fiber obtained is 0.3% of the total volume of the material, select the modified toughening fiber;

[0045] ②After uniformly mixing th...

Embodiment 3

[0053] Example 3: Comparison of the attenuation of mechanical properties of imported fiber modified and unmodified

[0054] Basically the same as Example 1, the difference is:

[0055] The acidic film-forming substance dilution is obtained by mixing boric acid anhydride, styrene-butadiene emulsion and water, and the parts by mass of each raw material are: 1 part of boric acid anhydride, 48 parts of styrene-butadiene emulsion, and 51 parts of water.

[0056] The admixture is metakaolin and silica fume, and the mass ratio of metakaolin to silica fume is 1:1.

[0057] The sand is sand with a particle size less than 0.6 mm.

[0058] The thickener is hydroxypropyl methylcellulose ether.

[0059] The experimental method is the same as that in Example 1, and the results show that the present invention further improves the toughness of existing high-toughness cement-based materials and reduces the decay of mechanical properties of high-toughness cement-based materials over time. Th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
compressive strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of construction materials, and particularly relates to a modified fiber toughened cement-based material and a preparation method thereof. The cement-based material is characterized by being prepared from the following components in parts by mass: 20-30 parts of cement, 10-30 parts of admixture, 20-40 parts of sands, 10-25 parts of water, 0.1-1 part of a water reducing agent, 0.1-1 part of thickening agent and modified toughened fibers which have an adding amount being 0.3-3 percent of total volume of the materials, wherein the modified toughened fibers are prepared by soaking toughened fibers in an acid film forming material diluting solution and drying. The modified fiber toughened cement-based material can be used for further promoting toughness of an existing high-toughness cement-based material and reducing the mechanical performance degradation of the high-toughness cement-based material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a modified fiber toughened cement-based material and a preparation method thereof. Background technique [0002] Since the advent of Portland cement in the 1920s, concrete materials formulated with it have become one of the most widely used and most successful structural engineering materials due to their excellent building performance. However, the lack of high ductility of the concrete material itself, leading to 1) brittle failure under extreme loads, 2) failure under normal loads due to insufficient durability, and lack of sustainability limit the application of this material. The important issue of its engineering structural performance degradation over time and its impact on service life has also aroused widespread concern in engineering circles at home and abroad, especially the widespread use of low-quality concrete materials in my country. The reliability is f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B16/06
CPCC04B28/00C04B16/0641
Inventor 水中和郑又瑞孙涛
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com