| 摘要 |
PCT No. PCT/AU96/00093 Sec. 371 Date Nov. 12, 1997 Sec. 102(e) Date Nov. 12, 1997 PCT Filed Feb. 22, 1996 PCT Pub. No. WO96/26437 PCT Pub. Date Aug. 29, 1996A method and system for determining the free cement content of concrete plant waste water held in a pit or tank P in which the temperature of the water in the pit or tank and the temperature of water in a reference pit or tank R1, is measured by thermocouples (T1, T2), the difference in temperature DELTA T determined and used to calculate an estimate of the free cement in the waste water whereby the reduced amount of cement to be used in a concrete batching process (without compromising the strength of the concrete product) can be determined. |
