METHOD OF MAKING GLASS ROVING IN HARDENING CEMENT STONE Russian patent published in 1998 - IPC

FIELD: manufacture of thin walled products from fine grain cement reinforced with alkali glass roving. SUBSTANCE: method comprises impregnating glass roving with composition. The latter comprises, wt.%: microsilica, 10; portland cement, 85; 3-5 of superplasticizer at water to binder ratio of 0.5, impregnation being carried out prior to molding process. Addition of active addition agents (e.g. microsilica) to impregnating composition makes it possible to reduce its alkalinity and assure long service of products from fine grain concrete and reinforced with alkali resistant glass roving. EFFECT: higher efficiency.