High-wave impedance concrete as well as preparation method and application thereof

A wave impedance and concrete technology, which is applied in the field of preparation, high wave impedance concrete, and hole bottom accumulation-energy dissipation base, can solve the problems of difficult forming and processing of steel materials, difficult large-scale application, time-consuming and labor-intensive, etc., to improve the utilization rate of blasting energy and the flatness of the bottom of the hole, increase the density of stones, and have good economical effects

Inactive Publication Date: 2015-03-25
WUHAN UNIV
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Problems solved by technology

[0005] In order to realize the blasting and excavation of the energy-gathering-dissipating base, it is necessary to use high-wave impedance materials to make the energy-gathering-dissipating base. At th

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  • High-wave impedance concrete as well as preparation method and application thereof
  • High-wave impedance concrete as well as preparation method and application thereof
  • High-wave impedance concrete as well as preparation method and application thereof

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Embodiment

[0029] The rock foundation blasting excavation project of a hydropower station needs to ensure the flatness of the foundation surface. The deep hole step blasting is adopted. In order to realize rapid construction, the vertical hole is required to be blasted at one time. In order to obtain a relatively flat foundation surface and ensure the flatness of the hole bottom, it is necessary to install the hole bottom energy-dissipating base. A high-wave impedance concrete is designed to improve the energy utilization efficiency of drilling and blasting and the flatness of the bottom of the hole. The requirements are as follows: the density reaches 3500-4500kg / m 3 , the longitudinal wave velocity reaches 3900-4200m / s in 7 days, and the longitudinal wave velocity reaches 4300-4600m / s in 28 days. It is known that the diameter of the blast hole during the excavation process is 105mm, and the technical requirement is that the average fluctuation difference is not greater than 0.1m

[00...

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Abstract

The invention discloses high-wave impedance concrete as well as a preparation method and application thereof. The high-wave impedance concrete is prepared from the following components including cement, water, iron sands and an effective water reducing agent, wherein the water cement ratio is 0.24-0.28, the mass ratio of the cement to the iron sands is 1:(1.6-3.0), and the quality of the effective water reducing agent accounting for 1.0-2.0 percent of the quality of the cement. According to the preparation method disclosed by the invention, the cement, the water, the iron sands and the effective water reducing agent are mixed to carry out gelatinization to form the high-wave impedance concrete, and slurry formed by the cement and the water wraps the iron sands by virtue of mixing, and hardening is carried out to form calculus; water dosage is reduced by virtue of the effective water reducing agent, and the calculus density is improved; meanwhile, as the density of the concrete and longitudinal wave propagation speed of the concrete are increased by utilizing the iron sands, the high-wave impedance concrete is obtained, and the reflectivity of explosive blast can be improved.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and relates to a high-wave impedance concrete, a preparation method and an application thereof, which can be used to manufacture hole bottom energy-dissipating bases required in blasting and excavation of rock foundations. Background technique [0002] In the blasting and excavation process of rock foundations in water conservancy and hydropower projects, transportation, mining and other fields, there are problems that need to be solved when using blasting method to excavate rock mass, such as rapid construction, excavation forming, and fine damage control. [0003] The traditional rock foundation excavation method adopts step blasting and reserves a protective layer. Since the excavation of the protective layer is usually divided into three layers, the construction efficiency is low and the construction progress is affected. On this basis, the primary blasting method of filling the ...

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Application Information

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IPC IPC(8): C04B28/00C04B28/04F42D3/04
Inventor 卢文波胡浩然严鹏陈明韩斌朱强
Owner WUHAN UNIV
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