Mineral additives and production of lightweight composite materials from carbonatable calcium silicate

A composite material, calcium silicate technology, used in cement production, carbon capture, ceramic products, etc.

Pending Publication Date: 2020-01-07
SOLIDIA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcarbonation can become a serious problem

Method used

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  • Mineral additives and production of lightweight composite materials from carbonatable calcium silicate
  • Mineral additives and production of lightweight composite materials from carbonatable calcium silicate
  • Mineral additives and production of lightweight composite materials from carbonatable calcium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Use 92.5wt% (solid) of Pecs, 7.5wt% (solid) of CaO and 0.13% (solid) of Al powder, 15% (of the addition of Al) surfactant to prepare water-based slurry, As-cast slurry can form foam by itself. These slurries can be prepared with or without superplasticizers / dispersants, with W / S ratios ranging from 0.35 to 0.70 or higher. The CO2-cured, gas-entrained samples of this example showed calcite as the predominant carbonation phase, with no aragonite, as analyzed by X-ray diffraction (XRD). These samples achieved compressive strengths ranging from approximately 0.2 to 1.9 MPa and densities ranging from 450 to 540 kg / m 3 .

Embodiment 2

[0092] Using 1.67wt% (solid) of magnesium acetate tetrahydrate, 90.83wt% (solid) of Pecs and 7.5% (solid) of CaO and 0.143% (solid) of Al powder, 20% (the addition of Al ) surfactant to prepare water-based slurry, and the cast slurry can form foam by itself. These slurries can be prepared with or without superplasticizers / dispersants, with W / S ratios ranging from 0.4 to 0.60 or higher. The CO2-solidified, gas-entrained samples in this example showed aragonite whiskers or needles as their primary carbonation phase and calcite as their secondary carbonation phase by X-ray diffraction (XRD) analysis. These samples achieved compressive strengths ranging from approximately 1.6 to 3.1 MPa and densities ranging from 480 to 490 kg / m 3 .

Embodiment 3

[0094] Use 10wt% (solid) of submicron high activity magnesia, 86wt% (solid) of Pecs and 4% (solid) of CaO and 0.143% (solid) of Al powder, 20% (the addition of Al ) surfactant to prepare water-based slurry, and the cast slurry can form foam by itself. These slurries can be prepared with or without superplasticizers / dispersants, with W / S ratios ranging from 0.4 to 0.60 or higher. The CO2-solidified, gas-entrained samples in this example showed aragonite and dolomite as the major carbonation phases, and calcite as the minor carbonation phase, as analyzed by X-ray diffraction (XRD). These samples achieved a compressive strength of about 2.5MPa and a density range of 460±4kg / m 3 .

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Abstract

The invention provides novel aerated composite materials made from a carbonatable calcium silicate composition, and formulations and methods of manufacture and use thereof, in particular, the use of novel additive mineral compositions in the form of magnesium, magnesium salts or magnesium oxides, to improve physical chemical properties of low density concrete materials. The low density, aerated material is comprised of calcium carbonate (CaC03) and silica (Si02), as cured products of carbonatable calcium silicate compositions.

Description

[0001] Priority claims and related patent applications [0002] This application claims the benefit of priority to U.S. Provisional Application Serial No. 62 / 475,403, filed March 23, 2017, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention generally relates to air-entrained composite materials and processes for their production. More specifically, the present invention relates to a new air-entraining composite material made from a carbonatable calcium silicate composition and its formulation, manufacture and use, especially a new additive mineral component in improving the performance of lightweight concrete materials , such as durability and strength uses. The gas-entraining composite material of the present invention, as the cured product of the carbonatable calcium silicate composition, is composed of calcium carbonate (CaCO 3 ) and silicon dioxide (SiO 2 )consist of. Background technique [0004] In gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B40/02C04B28/02C04B22/08
CPCC04B28/10C04B28/188Y02P40/18Y02P40/10Y02W30/91C04B14/043C04B14/304C04B22/04C04B38/02C04B40/0231C04B2103/32C04B7/3453C04B2103/0012B28B1/503B28B11/245C04B28/105C04B38/0058
Inventor 艾哈迈德·居内伊特·塔什
Owner SOLIDIA TECH
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