Is your business at the cutting edge of service delivery while making the property a cleaner, healthier and safer place to work and rest in If so, IH&RA wants to hear from you! Apply for the IH&RA Environmenta...Is your business at the cutting edge of service delivery while making the property a cleaner, healthier and safer place to work and rest in If so, IH&RA wants to hear from you! Apply for the IH&RA Environmental Award, now in its 14th year, and receive international recognition for your environmental best practices at the association’s Annual Congress, “Orient Express: Destination China! New Markets, New Competition” to be held 28-30 October in Beijing!展开更多
The participants in the Symposium on Environmental Protection and Ecology in Develo-ping Countries, cosponsored by the Chinese Academy of Sciences (CAS) and the Federation of Asian Scientific Academies & Societies...The participants in the Symposium on Environmental Protection and Ecology in Develo-ping Countries, cosponsored by the Chinese Academy of Sciences (CAS) and the Federation of Asian Scientific Academies & Societies (FASAS), held in Beijing, China, on 1-4 November 1989.展开更多
The feasibility of using different generations recycled coarse aggregate（RCA） on structural concrete was fully evaluated by studying the performance of the recycled coarse aggregates and their corresponding concrete...The feasibility of using different generations recycled coarse aggregate（RCA） on structural concrete was fully evaluated by studying the performance of the recycled coarse aggregates and their corresponding concretes, the different generations of RCA were recycled by following the repeated mode of ‘concrete-waste concrete-coarse aggregate-concrete＇. Moreover, the focus was on ‘three generations＇ of repeated RCAs, the RCA was produced by crushing and regenerating the artificial accelerated degraded concrete, the process was designed to follow the nature degradation of the concrete with a coupling action of accelerated carbonation and bending load. The properties of x-generation（x=1, 2 or 3） of repeated RCA were systematically investigated and the compressive and splitting tensile strengths of relating structural concretes（with 70% replacement of x-generation of RCA） were studied accordingly. The results show a competent compressive and splitting tensile strength of 30 MPa at 28 th day of structural concretes with all generations of repeated RAC. And the gradual degraded performance of the repeated RCAs was observed with an increased numbers of repetition（1〉2〉3 generations）, the overall performances of all repeated RCAs fulfill the Class Ⅲ according to Chinese Standards GB25177-2010. Our gained insight demonstrates a feasibility of using at least 3 generations of repeated RCA for the production of normal structural concrete.展开更多
文摘Is your business at the cutting edge of service delivery while making the property a cleaner, healthier and safer place to work and rest in If so, IH&RA wants to hear from you! Apply for the IH&RA Environmental Award, now in its 14th year, and receive international recognition for your environmental best practices at the association’s Annual Congress, “Orient Express: Destination China! New Markets, New Competition” to be held 28-30 October in Beijing!
文摘The participants in the Symposium on Environmental Protection and Ecology in Develo-ping Countries, cosponsored by the Chinese Academy of Sciences (CAS) and the Federation of Asian Scientific Academies & Societies (FASAS), held in Beijing, China, on 1-4 November 1989.
基金Funded by the National Natural Science Foundation of China(No.51278073)Prospective Joint Research Project of Jiangsu Province(Nos.BY2013024-17,BY2014037-30,and BY2015027-23)
文摘The feasibility of using different generations recycled coarse aggregate（RCA） on structural concrete was fully evaluated by studying the performance of the recycled coarse aggregates and their corresponding concretes, the different generations of RCA were recycled by following the repeated mode of ‘concrete-waste concrete-coarse aggregate-concrete＇. Moreover, the focus was on ‘three generations＇ of repeated RCAs, the RCA was produced by crushing and regenerating the artificial accelerated degraded concrete, the process was designed to follow the nature degradation of the concrete with a coupling action of accelerated carbonation and bending load. The properties of x-generation（x=1, 2 or 3） of repeated RCA were systematically investigated and the compressive and splitting tensile strengths of relating structural concretes（with 70% replacement of x-generation of RCA） were studied accordingly. The results show a competent compressive and splitting tensile strength of 30 MPa at 28 th day of structural concretes with all generations of repeated RAC. And the gradual degraded performance of the repeated RCAs was observed with an increased numbers of repetition（1〉2〉3 generations）, the overall performances of all repeated RCAs fulfill the Class Ⅲ according to Chinese Standards GB25177-2010. Our gained insight demonstrates a feasibility of using at least 3 generations of repeated RCA for the production of normal structural concrete.
