US 11,981,606 B2
Cement-reduced construction composition
Massimo Bandiera, Trostberg (DE); Peter Schwesig, Trostberg (DE); and Bernhard Sachsenhauser, Trostberg (DE)
Assigned to Construction Research & Technology GmbH, Trostberg (DE)
Appl. No. 18/023,268
Filed by Construction Research & Technology GmbH, Trostberg (DE)
PCT Filed Aug. 25, 2021, PCT No. PCT/EP2021/073435
§ 371(c)(1), (2) Date Feb. 24, 2023,
PCT Pub. No. WO2022/043348, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 20192863 (EP), filed on Aug. 26, 2020.
Prior Publication US 2023/0303446 A1, Sep. 28, 2023
Prior Publication US 2024/0092697 A9, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C04B 28/26 (2006.01); C04B 11/30 (2006.01); C04B 14/06 (2006.01); C04B 24/06 (2006.01); C04B 24/26 (2006.01); C04B 28/04 (2006.01); C04B 28/14 (2006.01)
CPC C04B 28/26 (2013.01) [C04B 11/30 (2013.01); C04B 14/06 (2013.01); C04B 24/06 (2013.01); C04B 24/2652 (2013.01); C04B 28/04 (2013.01); C04B 28/14 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A cement-reduced construction composition comprising
a) a cementitious binder comprising one or more calcium silicate mineral phases and one or more calcium aluminate mineral phases, and having a Blaine surface area of at least 3800 cm2/g, in an amount of 180 to 400 kg per m3 of a freshly mixed construction composition;
b) a fine material having a Dv90 of less than 200 μm, selected from alkali-activatable binders, rock powders and inorganic pigments, or mixtures thereof, in a total amount of 20 to 200 parts by weight, relative to 100 parts by weight of cementitious binder a);
c) optionally, an extraneous aluminate source;
d) a sulfate source; and
e) a polyol in an amount of 0.3 to 2.5 wt.-%, relative to the amount of cementitious binder a);
wherein the composition contains available aluminate, calculated as Al(OH)4−, from the calcium aluminate mineral phases plus the optional extraneous aluminate source, per 100 g of cementitious binder a), in a total amount of
at least 0.08 mol, if the amount of cementitious binder a) is in the range of 180 to less than 220 kg per m3 of the freshly mixed construction composition,
at least 0.06 mol, if the amount of cementitious binder a) is in the range of 220 to less than 280 kg per m3 of the freshly mixed construction composition, and
at least 0.05 mol, if the amount of cementitious binder a) is 280 kg or more per m3 of the freshly mixed construction composition;
and the molar ratio of total available aluminate to sulfate is 0.4 to 2.0;
the construction composition further comprising
f) an ettringite formation controller comprising (i) glyoxylic acid, a glyoxylic acid salt and/or a glyoxylic acid derivative; and (ii) at least one of (ii-a) a borate source and (ii-b) a carbonate source, wherein the carbonate source is selected from inorganic carbonates having an aqueous solubility of 0.1 g·L−1 or more at 25° C., organic carbonates, and mixtures thereof, and
g) a co-retarder selected from (g-1) α-hydroxy monocarboxylic acids and salts thereof, (g-2) phosphonic acids and salts thereof, (g-3) polycarboxylic acids and salts thereof, and mixtures thereof.