Sampling and testing of concrete mixing station

In March 15 , the Shenzhen Municipal Bureau of Housing and Urban from 92 concrete mixing station group detected 165 samples , 16 groups of efficacy fail , fail rate of 9.7% , related to concrete production enterprises 15 .
The overall quality of the concrete in  Bolted Type Cement Silo  , after all , in February announced the above " plan " performance , according to the business research environment , the current Shenzhen ready-mixed concrete strength grade C20 ~ C40 (referring to the compressive strength ) ratio of 60% to 80%, high intensity C40 concrete at about 20 %.
Year after year, the Shenzhen Heng Yu build quality problems and frequent disputes without a break. Excessive exercise chloride ion content of concrete sand as raw materials in Shenzhen repeated. The end of the last century, 80 years of building Louden village welfare housing , and  mobile concrete batching plant  the exercise of the process in less than Ge Hai sand, now demolished and rebuilt the Shenzhen authorities . Because many of the " saltwater sand " that build sand into the market , the relevant part of Shenzhen on the next hair care , requiring enhanced build sand RBI . The past ten years , the inflow of less than Ge Hai still some sand to build the project .