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Hydrophobic low shrinkage lightweight cementitious matrix

A composite material, low shrinkage technology, applied in the field of cement-based composite materials, can solve the problem of not providing detailed composition details of cement-based materials

Active Publication Date: 2015-11-11
NANO & ADVANCED MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they do not provide the detailed composition of the cement-based material and the details of the method

Method used

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  • Hydrophobic low shrinkage lightweight cementitious matrix
  • Hydrophobic low shrinkage lightweight cementitious matrix
  • Hydrophobic low shrinkage lightweight cementitious matrix

Examples

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Effect test

Embodiment 1

[0039] Example 1 - Formulations or Compositions and Methods for Making Hydrophobic, Low Shrinkage and Low Density Cementitious Composite Materials

[0040] To prepare a lightweight cement-based composite material with a specific gravity of about 1.4, first 290 g of calcium sulfoaluminate cement, 146 g of ordinary Portland cement, 450 g of ground granulated blast furnace slag, 125 g of limestone powder, and 253 g of surface-treated clay-like materials In dry powder form, mix and stir to form a mixture of powdered raw materials. At the same time, 3.17g of polycarboxylate-based water reducer, 0.127g of hydroxypropyl methylcellulose and 3.28g of boric acid were added to 365g of water and mixed to form an admixture solution. The admixture solution is then added to the prepared powdered raw material mixture and mixed until a uniform wet slurry is formed. In order to reduce the density of the wet slurry of the cement-based composite material obtained, 2.3g of protein foaming agent i...

Embodiment 2

[0041] Example 2 - Formulations or Compositions and Methods for Making Hydrophobic, Low Shrinkage and Low Density Cementitious Composite Materials

[0042] To prepare a lightweight cement-based composite material with a specific gravity of about 0.9, first 862 g of ordinary Portland cement, 52 g of gypsum (hemihydrate), 1136 g of ground granulated blast furnace slag, 375 g of limestone powder, and 125 g of surface-treated clay The materials are mixed and stirred in the form of dry powder to form a mixture of powdery raw materials. At the same time, 17.3g of polycarboxylate-based water reducer, 0.25g of hydroxypropyl methylcellulose and 12.9g of calcium formate were added to 752g of water and mixed to form an admixture solution. The admixture solution is then added to the prepared powdered raw material mixture and mixed until a uniform wet slurry is formed. In order to reduce the density of the resulting wet slurry of cement-based composites, a dry foam with a specific gravity...

Embodiment 3

[0044] Example 3 - Formulations or Compositions and Methods for Making Hydrophobic, Low Shrinkage and Ultra-Low Density Cementitious Composites

[0045] To prepare ultra-low density cement-based composites with a specific gravity of about 0.4, 54 g of calcium sulfoaluminate cement, 54 g of ordinary Portland cement, 112 g of ground granulated blast furnace slag, 31 g of limestone powder, and 63 g of surface-treated clay The materials are mixed and stirred in the form of dry powder to form a mixture of powdery raw materials. At the same time, 2.13g of polycarboxylate-based water reducer, 0.031g of hydroxypropyl methylcellulose, 0.427g of tartaric acid and 0.3g of calcium stearate were added to 113g of water and mixed to form an admixture solution. The admixture solution is then added to the prepared powdered raw material mixture and mixed until a uniform wet slurry is formed. In order to reduce the density of the wet slurry of the obtained cement-based composite material, 30g o...

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Abstract

The present invention provides a composition for forming a lightweight, low shrinkage and hydrophobic cementitious matrix, and a method for preparing thereof. The present cementitious matrix formed by the composition is lightweight, hydrophobic (or water repelling) and with low shrinkage which is useful in building and construction industry as non-structural wall resistant to water, heat and sound entry. The present invention also provides a method of preparing the composition and the cementitious matrix formed from the composition.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application Serial No. 61 / 963,282, filed November 29, 2013, the disclosure of which is incorporated herein by reference. technical field [0003] The invention relates to a formulation or composition for preparing cement-based composite material with low density, low shrinkage and hydrophobic properties, a cement-based composite material with low density, low shrinkage and hydrophobic properties, and a preparation method thereof. The cement-based composite material of the present invention made from the formula or composition has the characteristics of light weight, hydrophobicity (or water repellency) and low shrinkage, and it can be used to prepare non-structural ( or non-load bearing) walls or panels or tiles. Background technique [0004] The walls of most buildings today are made of reinforced concrete. Although concrete can be considered as an insulating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B28/14C04B24/08C04B14/10C04B38/10C04B38/02
CPCC04B28/14C04B28/065C04B2111/34C04B2111/40Y02W30/91C04B7/02C04B14/10C04B14/28C04B18/141C04B22/0013C04B24/14C04B24/2641C04B24/383C04B38/10C04B24/04C04B22/143C04B38/02C04B2103/22C04B2103/302C04B2103/40C04B2103/44C04B2103/48C04B2103/65
Inventor 尹启泰朱宏刚
Owner NANO & ADVANCED MATERIALS INST
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