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Quick determination method of different porosities of porous concrete

A rapid measurement technology for porous concrete, applied in suspension and porous material analysis, measurement devices, permeability/surface area analysis, etc., can solve the problems of complex operation, inaccurate results, single porosity, etc. Accurate, time-consuming results

Active Publication Date: 2020-01-10
ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention solves the technical problems of inaccurate results in the measurement process of porous concrete porosity in the prior art, the tested porosity is too single, and complex operation

Method used

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  • Quick determination method of different porosities of porous concrete
  • Quick determination method of different porosities of porous concrete
  • Quick determination method of different porosities of porous concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Preparation of porous concrete samples to be tested. The preparation process is roughly as follows: the raw materials are 42.5 ordinary Portland cement and stones with a particle size range of 2-5mm, set a certain ratio of raw materials and water-cement ratio, and inject them into a mold of 40mm×40mm×40mm after mixing and stirring, and then Put it on the vibrating table, set a certain vibrating frequency and vibrating time, vibrate and form, and after demoulding, maintain under certain conditions.

[0072] Porous concrete specimen wax seal. The specific wax sealing process is as follows: paraffin wax and rosin are prepared in a certain proportion to form a certain viscosity wax liquid, which is gently applied to the side and bottom surface of the porous concrete. The main purpose is to fill the surface pores on the side and bottom.

[0073] figure 1 For vacuuming device. The water tank 1 is filled with water 2 that does not contain air, and the water tank 1 is connec...

Embodiment 2

[0103] Preparation of porous concrete samples to be tested. The preparation process is roughly as follows: the raw materials are 42.5 ordinary Portland cement and stones with a particle size range of 2-5mm, set a certain ratio of raw materials and water-cement ratio, and inject them into a mold of 60mm×60mm×60mm after mixing and stirring, and then Put it on the vibrating table, set a certain vibrating frequency and vibrating time, vibrate and form, and after demoulding, maintain under certain conditions.

[0104] Porous concrete specimen wax seal. The specific wax sealing process is as follows: paraffin wax and rosin are prepared in a certain proportion to form a certain viscosity wax liquid, which is gently applied to the side and bottom surface of the porous concrete. The main purpose is to fill the surface pores on the side and bottom.

[0105] figure 1 For vacuuming device. The water tank 1 is filled with water 2 that does not contain air, and the water tank 1 is connec...

Embodiment 3

[0115] Preparation of porous concrete samples to be tested. The preparation process is roughly as follows: the raw materials are 42.5 ordinary Portland cement and stones with a particle size range of 2-5mm, set a certain ratio of raw materials and water-cement ratio, and inject them into a mold of 130mm×130mm×130mm after mixing and stirring, and then Put it on the vibrating table, set a certain vibrating frequency and vibrating time, vibrate and form, and after demoulding, maintain under certain conditions.

[0116] Porous concrete specimen wax seal. The specific wax sealing process is as follows: paraffin wax and rosin are prepared in a certain proportion to form a certain viscosity wax liquid, which is gently applied to the side and bottom surface of the porous concrete. The main purpose is to fill the surface pores on the side and bottom.

[0117] figure 1 For vacuuming device. The water tank 1 is filled with water 2 that does not contain air, and the water tank 1 is con...

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Abstract

The invention relates to a determination method of different porosities of porous concrete, and belongs to the technical field of porosity measurement. The method comprises the following steps of firstly, calculating the volume of a porous concrete sample; drying the to-be-tested porous concrete sample; coating wax liquid on five surfaces of the dried porous concrete sample, sealing by wax, weighing, and recording as the absolute dry mass Mad of the sample; placing the wax-sealed sample in a vacuumizing device, enabling the surface without wax-sealing to be upward, vacuumizing, injecting liquid without air into the vacuumizing device, enabling water to cover the sample, taking out the to-be-tested porous concrete sample, enabling the surface without wax sealing to be upwards all the time in the taking-out process, weighing, and recording as the saturated mass Msw of the sample; then discharging liquid filled in the communication holes, and then weighing, recording as the liquid-discharged mass Md of the sample; computing to obtain the total porosity, the effective porosity and the ineffective porosity of the to-be-tested porous concrete. The device disclosed by the invention has the advantages of being simple in device, simple in operation, short in time consumption and more accurate in result.

Description

technical field [0001] The invention belongs to the technical field of porosity measurement, in particular to a method for measuring different porosities of porous concrete. Background technique [0002] In recent years, as the urban waterlogging situation has become more and more severe, the government has introduced a series of sponge city policy measures, among which porous concrete has played a vital role in improving the rainwater retention on traditional hardened pavements, and its application scope has become more and more extensive. Porous concrete is a honeycomb structure with evenly distributed pores, which is prepared with cement as cementing material, special graded aggregate, water and admixture in a certain proportion and specific process, often without fine aggregate, also known as "sand-free concrete". [0003] The pores in porous concrete can be divided into three pore forms: connected pores, semi-connected pores and closed pores according to their connectiv...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0893
Inventor 杨家宽胡达清李喜龙张元赏梁莎张力李嘉豪林王坚李星吾潘超群吕瑞斌钟程鹏杨自荣肖可可侯慧杰胡敬平
Owner ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD