US 9,809,496 B2
Additive for cementitious materials
Hannele Kuosa, Espoo (FI); Anna Suurnakki, Espoo (FI); Antti Laukkanen, Helsinki (FI); Jan-Erik Teirfolk, Turku (FI); and Markku Leivo, Espoo (FI)
Assigned to UPM-KYMMENE CORPORATION, Helsinki (FI)
Appl. No. 14/915,664
Filed by UPM-Kymmene Corporation, Helsinki (FI)
PCT Filed Aug. 28, 2014, PCT No. PCT/FI2014/050656
§ 371(c)(1), (2) Date Mar. 1, 2016,
PCT Pub. No. WO2015/033018, PCT Pub. Date Mar. 12, 2015.
Claims priority of application No. 20135899 (FI), filed on Sep. 6, 2013.
Prior Publication US 2016/0257614 A1, Sep. 8, 2016
Int. Cl. C04B 24/38 (2006.01); C04B 28/02 (2006.01); C04B 38/02 (2006.01); C04B 38/10 (2006.01); C04B 20/00 (2006.01); C04B 7/36 (2006.01); C04B 103/48 (2006.01); C04B 111/00 (2006.01); C04B 111/20 (2006.01)
CPC C04B 24/383 (2013.01) [C04B 7/36 (2013.01); C04B 20/006 (2013.01); C04B 28/02 (2013.01); C04B 38/02 (2013.01); C04B 38/10 (2013.01); C04B 2103/48 (2013.01); C04B 2111/00103 (2013.01); C04B 2111/29 (2013.01); Y02W 30/97 (2015.05)] 32 Claims
 
1. A method for stabilizing gas-entrainment of cementitious materials, comprising the steps of:
providing nanofibrillar cellulose (NFC);
providing at least one gas-entraining agent;
mixing said NFC and the at least one gas-entraining agent with a cementitious composition, comprising at least binder, and water to obtain a cementitious paste; and
allowing the thus obtained cementitious paste to harden to obtain gas-entrained cementitious material;
wherein the gas-entrained cementitious material has an air pore spacing factor less than 0.4 mm.