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Three Gorges Project Ⅰ fly ash quality control standards


Soil engineering, not only saving cement, played solid water reduction, good governance for the performance of fresh concrete _r + to improve the late strength and chemical resistance of concrete erosion. AAR, etc., but can reduce the temperature rise of cement hydration. I Gap simplified temperature control project on the durability of concrete are higher, and how the selection of good quality, adequate supply,[link widoczny dla zalogowanych], advanced technology, management of economic units of fly ash to meet the technical requirements do not count, a high-quality, high ■ the level of timely completion of key projects of concrete = Gap Phase II under the technical requirements of the individual. R = Gap with coagulation ten main project must meet the national standard GBI596 fly a l991 that \technical requirements for a】 998 with the second phase of artificial granite aggregate concrete, taking into account its high water consumption, requires strict temperature control to reduce the unit water and cement concrete technical features. J in the choice of appropriate pieces of high quality fly ash in the Three Gorges Project on the technical requirements are very cautious. First field trip of the quality of the power plant ash on the ability, and then press the \content) test, the test results meet the national standard GBI596-1991 and 1_ Gap Chi Cheng 1EPS04-1998 technical requirements and adequate supply to meet the needs of the second phase, using a two fly only the main indicators of the quality control of Mindanao Project I the main indicators of the quality of fly ash are listed in Table 1 of the Three Gorges Project Yuan I fly ash quality control standards I Received Date: 2002itl18 two Gorges project the amount of people the second stage of concrete, fly ash supply many manufacturers, we selected Pingwei Power J, Luo sulfur and Nanjing Electric Power Plant l f fly ash for quality analysis,[link widoczny dla zalogowanych], results showed that the Nanjing Electric Jl level gray water requirement ratio (91%) achieved - Gap J Cheng Xian coal provisions of the standard l-level The quality product technical requirements, and sulfur Luo, Ping Wei Plant water demand level gray T ratio of 93% and 94%,[link widoczny dla zalogowanych], low-r quality product standards. But I fly ash units are cell products. Nanjing Power Plant T-level in which loss on ignition ash up to 3.8%,[link widoczny dla zalogowanych], Luo ash sulfur level of 3.4% I, l-level Gray Pingwei only 14%, no more than I fly ash (5%) technical requirements, several other indicators did not exceed i Gap engineering standards [GIso4 ~ 1998 technical requirements. Table 2. Table 2 Class I site of the manufacturers test results of fly ash 4 Conclusion Because of the particularity of the Three Gorges Project, developed on behalf of the} 4-1998I fly ash,[link widoczny dla zalogowanych], such as quality control standards apply only to the scope of the Three Gorges Project, and other items in the construction of hydropower projects H Town as a reference site mixing systems are equipped with various coagulation laboratory and the construction supervision unit test channeling, and is equipped with sophisticated testing equipment, is responsible for each batch of coal core samples for quality testing, testing centers industry, random samples will be tested and strengthen supervision. Quality samples have found quality problems, first recheck the samples, re-elm I reach the fly ash i Gorges project technical standards required for cell production is not Taiwan, r 'Second Gorge project I developed the quality control of fly ash standards in the implementation process of a satellite problem still exist, progress needs to be improved. (Author: Zhou Changjiang _ Second Gap T in the way of a public trial t2, Ma Dong-ni, ZHANG Shu-Yi, Ye Guoqiang, Yichang 443133)
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