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Plant fiber enhanced wet-mixed mortar and preparation method thereof

A plant fiber and wet-mixed mortar technology, which is applied in the field of wet-mixed mortar production, can solve the problems of affecting the fluidity of wet-mixed mortar, insignificant improvement in mechanical properties, poor bonding performance, etc. The effect of mining and improving bond strength

Inactive Publication Date: 2018-03-13
中建西部建设北方有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the method adopted to solve the above problems is to add fiber reinforced materials, such as polypropylene fibers, etc. to the wet-mixed mortar, but the currently used fiber reinforced materials such as polypropylene generally have low surface energy, and the surface is smooth and hydrophobic. The bonding performance with the cement matrix is ​​poor, which affects the flow performance of the wet-mixed mortar, and the mechanical properties are not significantly improved

Method used

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  • Plant fiber enhanced wet-mixed mortar and preparation method thereof
  • Plant fiber enhanced wet-mixed mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, a plant fiber-reinforced wet-mix mortar with a strength grade of M5 is prepared, which is made of the following raw materials in parts by weight: cement 100kg, composite mineral admixture 22kg, sand 710kg, mortar stabilizer 4.1kg, mortar adjustment The weight of the cement is 0.15kg, plant fiber 0.09kg, and water is 121kg; the cement is Portland cement; the strength grade of the Portland cement is 42.5Mpa; the composite mineral admixture is mixed with the following parts by weight After stirring for 10 minutes to 30 minutes, it is prepared: 19.8kg of grade II fly ash, 1.76kg of grade S95 mineral powder, 0.4kg of limestone powder, and 0.044kg of gypsum; the sand is made by mixing ultra-fine sand and machine-made sand in a weight ratio of 1:4 The ultra-fine sand has a particle size of less than 4.75mm, a fineness modulus of 0.9, a machine-made sand particle size of less than 4.75mm, and a coefficient modulus of 3.0; the plant fiber is a wheat straw fiber pr...

Embodiment 2

[0035] In this embodiment, a plant fiber-reinforced wet-mix mortar with a strength grade of M10 is prepared, which is made of the following raw materials by weight: 100kg of cement, 38kg of composite mineral admixture, 680kg of sand, 4.6kg of mortar stabilizer, and mortar adjustment The weight of the slag cement is 0.12kg, the plant fiber is 0.15kg, and the water is 128kg; the cement is Portland slag cement; the strength grade of the Portland slag cement is 32.5Mpa; the composite mineral admixture consists of the following parts by weight After mixing the raw materials, stir for 10min~30min to prepare: Ⅱ grade fly ash 32.68kg, S95 grade ore powder 3.42kg, microbeads 0.38kg, limestone powder 1.52kg; the sand is made of ultra-fine sand and machine-made sand in a weight ratio of 1: 3.2 Mixed production; the particle size of the ultra-fine sand is less than 4.75mm, and the fineness modulus is 0.8; the particle size of the machine-made sand is less than 4.75mm, and the coefficient mo...

Embodiment 3

[0042] In this example, a plant fiber-reinforced wet-mix mortar with a strength grade of M15 is prepared, which is made of the following raw materials in parts by weight: cement 100kg, composite mineral admixture 51kg, sand 660kg, mortar stabilizer 5.3kg, mortar adjustment The weight of the cement is 0.11kg, plant fiber is 0.18kg, and the weight of water is 137kg; the cement is fly ash Portland cement; the strength grade of the fly ash Portland cement is 32.5Mpa; the composite mineral admixture is composed of The following parts by weight of the raw materials are mixed and stirred for 10 minutes to 30 minutes to prepare: Ⅱ grade fly ash 43.85kg, S95 grade mineral powder 4.08kg, silica fume 2.55kg, limestone powder 1.02kg; the sand is made of ultra-fine sand and machine-made sand The weight ratio is 1:1.5; the particle size of the ultra-fine sand is less than 4.75mm, and the fineness modulus is 1.1; the particle size of the machine-made sand is less than 4.75mm, and the coefficie...

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Abstract

The invention provides plant fiber enhanced wet-mixed mortar and a preparation method thereof. Natural plant fibers prepared by using a physical mechanical cutting and stirring method and a polymer encapsulation method are environmentally friendly without pollution and are excellent in performance; and by doping the natural plant fibers in wet-mixed mortar, the cracking problem can be solved, theopening time can be prolonged, the cost can be lowered, the interface bonding strength of the fibers own and a cement matrix, the flexural strength and the compressive strength are improved, environmental protection and sustainable development are facilitated, and a new way of applying the natural plant fibers is developed.

Description

Technical field [0001] The invention relates to the technical field of wet-mix mortar production, and more specifically to a plant fiber reinforced wet-mix mortar and a preparation method thereof. Background technique [0002] Plant fiber is the most abundant natural polymer material in nature. The total amount of cellulose that grows in nature every year reaches hundreds of billions of tons, which far exceeds the total oil reserves on the earth. The fiber morphology of plant fiber has the advantages of large aspect ratio, high specific strength, and large specific surface area. [0003] Construction mortar is one of the most used construction materials in construction projects. In recent years, with the technological progress of the construction industry and the improvement of civilized construction requirements, the traditional production method of mixing mortar on the construction site has increasingly exposed its use in mortar. Defects in quality and environmental protection. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B28/04C04B28/08C04B20/02
CPCC04B20/023C04B28/021C04B28/04C04B28/08C04B2111/00017C04B2201/10C04B2201/50C04B14/06C04B18/248C04B18/08C04B14/02C04B14/28C04B14/365C04B2103/302C04B2103/44C04B2103/304C04B2103/22C04B18/146
Inventor 张凯峰姚源罗作球王继博张涛刘磊任慧超王敏冯涛涛吴超
Owner 中建西部建设北方有限公司
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