Taunton concrete works - Mix improvements (TM-CES-32)

Consequent upon a change of aggregate source from that covered in TM18 of September 1973 me were asked to investigate two fine aggregates viz:- (i) Limestone fines to BS Zone 2 ex Foster Yaoman Shepton Wallet. (ii) Quartzitic sand " " " " ex ECC Quarries Hillhead, both...