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Lightweight composite materials produced from carbonatable calcium silicate and methods thereof

  • US 10,695,949 B2
  • Filed: 05/18/2015
  • Issued: 06/30/2020
  • Est. Priority Date: 05/18/2015
  • Status: Active Grant
First Claim
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1. A composite material comprising:

  • a plurality of bonding elements, each including a core comprising calcium silicate, a first layer which partially or fully surrounds the core and is rich in SiO2, and a second layer which partially or fully surrounds the first layer and is rich in CaCO3;

    a plurality of filler particles having particle sizes of 0.1 μ

    m to 1000 μ

    m;

    wherein the plurality of bonding elements and plurality of filler particles together form a bonding matrix and are substantially evenly dispersed in the matrix and bonded together, the bonding matrix having a pore volume;

    the pore volume comprises pores with a radius greater than 10.0 μ

    m,the pore volume further comprising 0.142-0.247 ml/1.0 g of composite material of pores with a radius of 0.004 μ

    m to 10.0 μ

    m,the composite material having an absolute dry density, as measured after drying a sample of the composite material in a convection dryer at 110°

    C. for at least 4 days, of 0.50 g/cm3 or more,the composite material having an estimated compressive strength, when the compressive strength is measured at an absolute dry density of 0.50 g/cm3, expressed by the following formula (1);

    Estimated compressive strength=compressive strength×

    (0.50÷

    absolute dry density)2 of 2.0 N/mm2 or more.

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