Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof

A technology of sprayed concrete and groundwater, which is applied in the field of high-performance shotcrete mixed with mineral powder and its preparation, which can solve the problems of stagnation, incomplete adaptation, and inapplicability to underground water-sealed oil depots, etc., and achieves extended service life, low cost, and high bond strength Effect

Inactive Publication Date: 2013-03-20
WUHAN UNIV +1
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Problems solved by technology

However, the regulations on sprayed concrete in these specifications still remain at an earlier technical level, and there is less consideration for current new technologies and ne

Method used

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  • Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof
  • Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof
  • Ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and preparation method thereof

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Embodiment

[0034]The main raw materials are cement, mineral admixture, aggregate, water reducer, shrinkage reducer and accelerator. The cement is P.O.42.5 ordinary Portland cement. Mineral admixtures are S95 grade high-quality mineral powder and I grade fly ash. The S95 grade high-quality mineral powder adopted in this embodiment has a specific surface area of ​​450m 2 / kg, the 7-day activity index was 85%, the 28-day activity index was 108%, and the fluidity ratio was 103%; the water demand ratio of the Class I fly ash used in this example was 98%. The water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the theoretical water reducing rate is 25%; the accelerator is an alkali-free liquid accelerator, and the solid content is 38%. The dosage of the accelerator in this embodiment is 6% of the mass of the cementitious material, which is cement and mineral admixtures.

[0035] The shrinkage reducing agent is mainly composed of 20% by weight polyacry...

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Abstract

The invention discloses an ore-powder-doped high-performance shotcrete applicable to underground watertight oil cellars and a preparation method thereof. The shotcrete disclosed by the invention comprises 267-370 kg/m<3> cement, 44-159 kg/m<3> ore powder, 0-140 kg/m<3> fly ash, 627-722 kg/m<3> stone, 855-962 kg/m<3> sand, 185-200 kg/m<3> water, 4.44-5.29 kg/m<3> high efficiency water reducing agent, 26.7-31.7 kg/m<3> alkali-free setting accelerator and 0-15.86 kg/m<3> shrinkage reducing agent. The shotcrete disclosed by the invention has the advantages of lower cost, lower shrinkage value, higher impermeability and favorable bonding property with rock; and the durability of the shotcrete as a permanent structural layer can be ensured.

Description

technical field [0001] The invention relates to a high-performance shotcrete used in permanent structures, in particular to a mineral powder-mixed high-performance shotcrete suitable for underground water-sealed oil depots and a preparation method thereof. Background technique [0002] Due to factors such as wars, uneven energy distribution, and geopolitics, the energy crisis has always been a major issue that governments need to consider. In the past 20 to 30 years, strategic oil reserves have received more and more attention in countries around the world. The underground water-sealed oil depot is the most popular form of oil reserves, based on the safety of the underground water-sealed oil depot, large storage capacity, small footprint, small investment, low loss, low pollution, low operation and management costs, fast loading and unloading, etc. With many advantages, it has been widely used in national strategic petroleum reserves and various commercial storages. As of 1...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 赵晓何真高志华荣耀久蔡新华
Owner WUHAN UNIV
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