A kind of method utilizing modified coconut shell fiber to prepare reinforced anti-cracking cement mortar

A technology of coconut shell fiber and cement mortar, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor toughness and easy cracking, and achieve improved toughness, low cost, and improved crack resistance Effect

Inactive Publication Date: 2018-03-30
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: according to the defects such as extremely easy cracking and poor toughness that are common in the existing cement mortar, the present invention provides a method for preparing reinforced anti-cracking cement mortar by using modified coconut shell fiber

Method used

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  • A kind of method utilizing modified coconut shell fiber to prepare reinforced anti-cracking cement mortar
  • A kind of method utilizing modified coconut shell fiber to prepare reinforced anti-cracking cement mortar
  • A kind of method utilizing modified coconut shell fiber to prepare reinforced anti-cracking cement mortar

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Embodiment 1

[0032] The present invention utilizes modified coconut shell fiber to prepare the method for strengthening anti-cracking cement mortar, and the detailed steps of this preparation method are as follows:

[0033] a. Processing of modified coconut shell fiber:

[0034] First, clean the coconut shell fiber, and then add it to the KOH solution with a mass percentage concentration of 6% for soaking. The soaking time is 2 hours; after soaking, the temperature is raised to 80°C, and heat treatment is carried out at this temperature for 15 minutes; after heat treatment, it is washed repeatedly with distilled water coconut shell fiber, stop washing until the pH value of the cleaning solution is 7, then dry the cleaned coconut shell fiber (dry in an oven, the drying temperature is 60 ° C, and the drying time is 3 hours), and cut after drying into coconut shell fibers of 8-12 mm to obtain modified coconut shell fibers;

[0035] b. Preparation of cement mortar:

[0036] 1m 3 Cement mort...

Embodiment 2

[0041] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0042] The present invention utilizes modified coconut shell fiber to prepare the method for strengthening anti-cracking cement mortar, differs from embodiment 1 in that:

[0043] In step a: then add it into a KOH solution with a mass percentage concentration of 6% for soaking, and the soaking time is 4 hours; after soaking, the temperature is raised to 100° C., and heat treated at this temperature for 30 minutes.

Embodiment 3

[0044] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0045] The present invention utilizes modified coconut shell fiber to prepare the method for strengthening anti-cracking cement mortar, differs from embodiment 1 in that:

[0046] In step a: then add it into a KOH solution with a mass percent concentration of 6% for soaking, and the soaking time is 6 hours; after soaking, the temperature is raised to 120° C., and heat treated at this temperature for 45 minutes.

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Abstract

The invention discloses a method for preparing reinforced anti-cracking cement mortar by utilizing modified coir fiber. The method comprises the steps of firstly, cleaning coir fiber, adding the cleaned coir fiber into a mixed solution of a KOH solution and H2O2, soaking and carrying out heat treatment; after heat treatment, sequentially washing, drying and shearing to obtain the modified coir fiber; after that, preparing cement mortar, and weighing the modified coir fiber to be added; enabling the modified coir fiber to fully absorb water to obtain water-saturated modified coir fiber; evenly mixing part of weighed cement and sand, then adding the water saturation modified coir fiber, adding the rest cement and sand in batches in the process of adding the fiber, finally adding water, and fully stirring; evenly dispersing the modified coir fiber into the cement mortar to obtain the anti-cracking and low-shrinkage cement mortar. The reinforced anti-cracking cement mortar prepared by the method is high in strength, good in toughness and remarkable in anti-cracking performance, and has certain environmental benefit.

Description

1. Technical field: [0001] The invention belongs to the technical field of building materials, and in particular relates to a method for preparing reinforced anti-cracking cement mortar by using modified coconut shell fibers. 2. Background technology: [0002] Cement mortar is a kind of brittle material, which is mainly used in places such as construction projects (such as building houses). Cement mortar for engineering is made by mixing cement and sand in a certain proportion. Cement mortar is a brittle material with poor toughness, high compressive strength, low flexural strength, and large shrinkage deformation. As the strength grade increases, the toughness becomes worse, that is, the brittleness becomes greater, so the cement mortar is very easy to crack, especially when it is used for the surface layer, it is very unfavorable. At present, there are many ways to improve the strength and crack resistance of cement mortar and reduce its natural shrinkage. For example, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/24C04B20/02C04B20/04C04B111/20
CPCC04B20/04C04B28/00C04B2111/2038C04B2201/50C04B18/248C04B14/06C04B20/023Y02W30/91
Inventor 赵玉青张文锋袁铁锁白宇金红伟杨维国李向卫王晖韩冰冰蔡俊辉徐文玉丁妍李晶栋刘光炎张书铭郑兵兵徐艳红黄蒙杨杰龙
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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