EP 2 838 574 B1

Admixture and method for freeze-thaw damage resistance and scaling damage resistance of cementitious compositions

(22) 19.04.2013

(43) 25.02.2015

(45) 09.03.2016

Description: Provided are a freeze-thaw damage resistance and scaling damage resistance admixture and a method of preparing a freeze-thaw damage resistant and scaling damage resistant cementitious composition.

Freeze-thaw cycles can be extremely damaging to water-saturated hardened cementitious compositions, such as concrete. The best known technique to prevent or reduce the damage done is the incorporation in the composition of ­microscopically fine pores or voids. The pores or voids function as internal expansion chambers and can therefore protect the composition from freeze-thaw damage by relieving changes in hydraulic pressure caused by freeze-thaw cycling. A conventional method used for producing such voids in cementitious compositions is by introducing air-entraining agents into the compositions, which stabilize tiny bubbles of air that are entrapped in the composition during mixing. […]

(73) Construction Research & Technology GmbH, 83308 Trostberg (DE)

(84) AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

x

Related articles:

Issue 2015-6 EP 1 893 547 B1

Providing freezing and thawing resistance to cementitious compositions

(22) 09.06.2006 (43) 05.03.2008 (45) 01.04.2015 (73) Construction Research & Technology GmbH, 83303 Trostberg (DE) (84) CH DE ES FR GB IT LI Summary: A cementitious freeze-thaw damage resistant...

more
Issue 2018-11 US 2018/0230057 A1

White cementitious compositions

(22) 11.04.2018 (43) 16.08.2018 (57) A cementitious composition includes (i) white Portland cement having a fineness of about 350-550 m2/kg, D90 between about 11-50 ?m, and total combined iron oxide,...

more
Issue 2018-3 US 2017/0369375 A1

Cementitious blend and concrete mix compositions resistant to high temperatures and alkaline conditions

(22) 28.06.2016 (43) 28.12.2017 (57) A cementitious blend composition and a concrete mix composition preferable for making concrete resistant to high temperatures and alkaline conditions, particularly...

more
Issue 2017-12 INGENIEURGRUPPE GEOTECHNIK | BAUHAUS-UNIVERSITÄT WEIMAR

Investigation of test methods for ­determining the resistance of mortars to frost and salt frost attack

1 Introduction Testing the resistance of concrete to frost and salt frost attack is a high-profile research subject [1] because of the mass usage of this construction material. The corresponding test...

more
Issue 2016-7-8 US 2016/0160109 A1

Novel cement composition for lost circulation application

(22) 25.11.2013 (43) 09.06.2016 (57) A method of cementing a subterranean formation includes providing a cement composition comprising cementitious material, aqueous base fluid, nanoparticles,...

more