| abstract |
A precast concrete plate, such as a roof tile, floor tile, wall tile or housensiding, comprises in total from about 0.2% to about 5% by weight of a polymericnmodifier having a Tg of above -40oC. The portion of said concrete whichncomprises no more than about 50% of the thickness of all the concrete whichnforms the plate, when measured from the bottom surface of the plate towards thentop surface of the plate, includes at least about 60% by weight of said polymericnmodifier. The plates have a relatively higher degree of resistance to flexuralnloadings and resistance to impact-impulse loadings in comparison to concretenplates which comprise no polymeric modifier, thus rendering them less likely tonbe broken or fractured during their storage, transfer and assembly. |