US 8,574,360 B2Granted

Cementitious formulations and products

AssigneeJames Hardie Technology Limited

InventorsXiangdong Feng, Meiling Gong, Chinmay Avinash Gowardhan, Chongjun Jiang, Michael John Julius, Amitabha Kumar, Shannon Marie Labernik, Xiangyuan Liu, Liyan Ma, Basil Taha Naji, Kalynne Hitzeman Paradis, David John Sharman

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Abstract

Cementitious formulations and their products with enhanced reactivity are provided. Formulations in certain embodiments may include at least one calcium source, a reactant and a filler in a hydrated environment, wherein the reactant, in one form, is crystalline silica that has been modified for reactivity. Enhancement of a reactant may include one or more modifications to its content, grind and/or the cement to silica ratio, as well as addition of one or more additives in the formulation, additives in the form of at least one alumina source, defoamer, catalyst and/or a clay.

Claims12

Dependent claims

A cured cementitious formulation formed by reacting a reactant with a calcium source, said formulation comprising:

silicon dioxide, wherein the silicon dioxide comprises reacted silica and unreacted residual SiO2;
calcium oxide;
and
a filler, wherein the reacted calcium oxide to total reacted silicon dioxide molar ratio is between about 0.80 and 1.80, wherein the reacted calcium oxide to the unreacted residual crystalline SiO2 molar ratio is between about 1.0 and 8.0, and wherein the total reacted silicon dioxide is the sum of the reacted silica from any source in the formulation, wherein the unreacted residual SiO2 content based on total weight is between about 5% and 30%.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/405,173Filed 24 Feb 2012 · continuation
Priority: 2 Oct 2007
Published: US 2012/0152154 A121 Jun 2012
Granted: 5 Nov 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification2 codes

C04B 28/02
Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic…
C04B
Lime, magnesia

Family

Application60/976,992Us provisional application · filed 2 Oct 2007
Application12/244,753Parent of this continuation · filed 2 Oct 2008
US 2012/0152154 A1Pre-grant publication · published 21 Jun 2012
US 8,147,610 B2Parent of this continuation
US 2009/0090276 A1Published application
US 8,574,360 B2This patent

From the US filing history. Foreign family members aren’t listed.