LEICHTER DACHZIEGEL AUS BETON UND ÄHNLICHE PRODUKTE.

摘要

A lightweight concrete product in the form of a concrete roof tile is made from a cementitious mixture comprising a porous lightweight aggregate, an hydraulic cement, water, an agent for enhancing flexural strength and an agent for enhancing the water retention capacity of the lightweight aggregate, the proportions being such that the product has satisfactory impact and flexural strengths.