Filtrate reducer additive for swelling clay grouts and cement-swelling clay grouts

US4424290A · kind A · utility

Assignee

• COATEX · FR

Inventors

• Jacky Rousset · Belleville, FR
• Roger P. Chavrier · Marseilles, FR

Key dates

• Filing date: Aug 13, 1981
• Grant date: Jan 3, 1984
• Expiry date: Aug 13, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K17/48
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An additive for swelling clay grouts and cement-swelling clay grouts, intended to reduce the filtrate, lower and stabilize viscosity, retard rigidification time, limit sweating and sedimentation of the solid constituents, is an alkaline ethylenic acid polymer and/or copolymer, with molecular weight between 500 and 20,000, but preferably between 1000 and 6000. This additive is especially advantageous in the fields of civil engineering, building, public works and drilling.