Concrete mixing plant waste water waste slurry effect on compressive strength of mortar

For guarantee test samples has better of representative, respectively in Beijing, and Shanghai, and Hubei Wuhan, and Chongqing, and Zhejiang Taizhou and Zhejiang Zhoushan select has 6 home concrete mixing station, according to 6 home concrete mixing station wastewater waste pulp performance of analysis results, select Beijing and Zhejiang Zhoushan total 2 home enterprise of production wastewater waste pulp for has mortar test, research on compressive strength of effect, test method according to cement rubber sand strength test method (ISO method) (GB 17671-1999) for. Waste pulp wastewater volume maximum water consumption of 60%, lists the waste slurry waste water in ion content of the mortar the values meets the standards for concrete water (JGJ63-2006). Effluent solid particles in waste pulp converted into fine aggregate, and the technical specification for ready-mixed concrete production and management (JGJ/T 328-2014) conversion of standard requirements for cementitious materials are different.

Gives Beijing wastewater waste slurry waste slurry waste water in Zhoushan and effects on the compressive strength of the mortar, there is a discrete data type, but still reflect a certain degree of regularity. ① for Beijing waste slurry waste water or waste slurry waste water in Zhoushan, cementitious materials are adding mineral admixtures in overall as the waste slurry waste water volume increases, 3D and 7d compressive strength of the mortar has a tendency to reduce. ② in the waste slurry waste water volume for water 20%, 40% and 60%, mixed with waste water waste slurry mortar specimens of 28D slight increase in compressive strength compared to baseline intensity (Zhoushan wastewater by slight differences in waste pulp pure cement mortar specimens), and usually think will cause a decrease instead. ③ Beijing 2.8% waste slurry solids content of a wastewater, waste slurry waste water in Zhoushan is 0.27%, a difference of nearly 10 times times, similar to the effect of compressive strength of the mortar.