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A Design Method of Permeable Concrete Mix Proportion Based on Mortar Properties

A technology of permeable concrete and mix ratio design, which is applied to ceramic products, other household appliances, household appliances, etc., can solve the problem of small selection of aggregates, and achieve the effect of reducing time and cost

Active Publication Date: 2019-08-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, affected by factors such as economy and geography in actual engineering, the range of available aggregates is usually small.

Method used

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  • A Design Method of Permeable Concrete Mix Proportion Based on Mortar Properties
  • A Design Method of Permeable Concrete Mix Proportion Based on Mortar Properties
  • A Design Method of Permeable Concrete Mix Proportion Based on Mortar Properties

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Experimental program
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Effect test

Embodiment 1

[0039] In order to prepare the target permeable concrete with a 28d water permeability coefficient of 7.5mm / s and a compressive strength of 20MPa, first refer to Figure 1-5 According to the law, it is determined that the required fluidity of the glue is 135 mm, the viscosity is 42 s, and the bonding strength is 1.7 MPa. After obtaining the required properties of the mortar, choose P.O.42.5 Huaxin cement, and the amount of each square is 350kg / m 3 , the water-cement ratio is 0.23, and the specific surface area of ​​silica fume is 18000m 2 / kg, the amount per side is 21kg / m 3 , to ensure that the bonding strength of the cement mortar is 1.7MPa; the water reducing agent is polycarboxylate high-efficiency water reducing agent, the water reducing rate is greater than 25%, and the dosage per square is 0.91kg / m 3 , the thickener is selected from cellulose ether, and the amount of each side is 0.07kg / m 3 , to ensure that the fluidity of the cement mortar is 135mm, and the viscosi...

Embodiment 2

[0042] In order to prepare the target permeable concrete with a 28d water permeability coefficient of 10mm / s and a compressive strength of 17MPa, first refer to Figure 1-5 According to the rule, it is determined that the required fluidity of the glue is 160 mm, the viscosity is 60 s, and the bonding strength is 1.4 MPa. After obtaining the required properties of the mortar, select Huaxin cement with P.O.42.5, and the amount per square meter is 330kg / m 3 , the water-cement ratio is 0.24, and the specific surface area of ​​silica fume is 18000m 2 / kg, the amount per side is 15kg / m 3 , to ensure that the bonding strength of the cement mortar is 1.4MPa; the water reducing agent is polycarboxylate high-efficiency water reducing agent, the water reducing rate is greater than 25%, and the amount of each square is 0.5kg / m 3 , the thickener is carboxymethyl cellulose, and the amount of each side is 0.2kg / m 3 , to ensure that the fluidity of the cement mortar is 110mm and the viscos...

Embodiment 3

[0045] In order to prepare the target permeable concrete with a 28d water permeability coefficient of 4mm / s and a compressive strength of 21MPa, first refer to Figure 1-5 According to the rule, it is determined that the required fluidity of the glue is 110 mm, the viscosity is 28 s, and the bonding strength is 1.8 MPa. After obtaining the required properties of the mortar, select Huaxin cement with P.O.42.5, and the amount per square meter is 370kg / m 3 , the water-cement ratio is 0.23, and the specific surface area of ​​silica fume is 20000m 2 / kg, the amount per side is 25kg / m 3 , to ensure that the bonding strength of the cement mortar is 1.8MPa; the water reducing agent is a naphthalene-based high-efficiency water reducing agent, the water reducing rate is greater than 20%, and the amount of each square is 1.4kg / m 3 , the thickener is selected from cellulose ether, and the amount of each side is 0.15kg / m 3 , to ensure that the fluidity of the cement mortar is 110mm and ...

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Abstract

The invention discloses a pervious concrete mix proportion design method based on mortar characteristics. By means of designing a cement and mortar ratio in pervious concrete, three mortar characteristics of fluidity, viscosity and bonding strength of the mortar are controlled; corresponding and required fluidity, viscosity and bonding strength of the mortar can be determined in combination with laws between the mortar characteristics and mechanical property and permeability performance of the pervious concrete and according to required permeability performance and intensity index requirements of target pervious concrete; the ratio also can be calculated out through the same way. The pervious concrete mix proportion design method disclosed by the invention can effectively reduce difficulty and errors of pervious concrete mix proportion design and has important theoretical significance and practical value in reasonable and wide application of the pervious concrete.

Description

technical field [0001] The invention belongs to the technical field of building material production, and in particular relates to a method for designing the mixing ratio of permeable concrete based on the characteristics of mortar. Background technique [0002] Modern urban construction mostly uses impermeable pavement, which leads to urban waterlogging and urban heat island effect in some areas, which brings great troubles to people's daily life, and even endangers economic property and personal safety in severe cases . The construction of "sponge city" has a significant effect on purifying groundwater resources, alleviating urban waterlogging, and improving the urban heat island effect. Permeable concrete is the main material for the pavement of the "sponge city", which is very critical to the realization of the concept of "sponge city". As a new type of ecological "sponge body", pervious concrete is mainly a porous concrete formed by a specific mixing method from coarse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B28/06C04B28/00C04B38/00C04B111/40
Inventor 陈潇王杰朱国瑞周明凯陈谦
Owner WUHAN UNIV OF TECH