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Wysłany: Czw 7:40, 06 Sty 2011
Temat postu: moncler outlet Second Fenhe project uses the first
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Second Fenhe project uses the first two God of feasibility analysis of ash
Of heat, reducing the role of temperature control costs. 22 Fly ash effect evaluation method for evaluating effects of common methods of lime absorption, dissolution method and the intensity ratio of law,
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, the solid strength of more intuitive than the method,
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, widely used in China. But the strength hardening response than the method of the Pastes only the structure and performance, and not a comprehensive response structure and properties of materials. So in recent years to use more comprehensive method to evaluate the effects of fly ash,
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, the factors to be considered include: strength ratio, fineness, water demand for normal consistency ratio, silica and alumina content and low iron content of the glass break, SO3 content, carbon content (loss on ignition that) and so on. In this paper, an integrated method to be used on the two fly ash storage project evaluation and comparison. 3 = Library 3.1 works on the choice of fly ash physical and mechanical performance test required under the dam project off from the economic and quality considerations, a primary power plant of Taiyuan, Taiyuan two power plants,
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, power plants and the first two God ZHANGZE Power to inspect and test fly ash, fly ash are two of four field 1 (Total 125) February 1999 one of Water Resources and SHANXIHYDROTECHNICS No. 1 (TotalNo.125) Feb. 1999 collection of dry ash. Sample performance test. Its chemical composition and physical and mechanical properties in Table l and Table 2. Table 1 the chemical composition of the four fly ash f% J Table 2, the physical properties of the four fly ash can see from Table 1, si and AL2q content of the first two God reached 87.08% Ash, Taiyuan ash reached a 73.08%. That God's activity in the first two high-Ash. Table 2 shows the test results. Taiyuan, the second is loaded with gray ash, ash Zhangze close Ⅲ level gray. Taiyuan, grade Ⅲ a gray ash. God was I the first two power level gray ash. Taiyuan, the strength of a fly ash ratio of 82.9%. God first of Ash intensity ratio of 119.6%. Comparative Analysis of 32 based on <Hydraulic Roller Compacted Concrete Construction Specifications) (SL53-94) provides, I, Ⅱ, Ⅲ grade ash can be used as roller compacted concrete with fly ash. According to the results that only God is the first two plants and a power plant in Taiyuan, the two gray for two library projects selected. In this connection, and the next two fly ash compared with engineering practice. ① distance: God first two power plants from second reservoir dam 240km, Taiyuan, a power plant 50km. ② Quality: head = God God Ash Table 3 the first two coal power plants with different contents of water demand Xiang and limb than the intensity of the I-level gray sand. Is the rare high-quality gray; Taiyuan, grade Ⅲ a gray ash, barely used. ◎ supply of dry ash capacity: the first two God of 100 million power plant installed kW (2 units × 50kW), ash yield of about 400t / d, and has a complete collection of dry ash gray equipment and storage tanks. Pretend to tank conditions; a power plant in Taiyuan, 60 million new units installed kW (2 units × 30 million kW). Ash produced about 240t / d, but did not get equipment and storage of dry ash gray tank, do not have the bulk ash supply conditions. The power plant to be launched The equipment cost about 150 million. And contact more than one year are not put into production. ④ ash bulk price; God head of Ash and a power plant in Taiyuan, are 40 yuan / t. ⑤ Water Usage: God first of Ash is currently being national key water conservancy project. Wanjiazhai water control project that use of Yellow River Diversion Project is also ready to use. And the use of results from the project are satisfied to see; Taiyuan use of a hydraulic power plant ash no experience and experience. Comparison of the above five areas, in addition to far distance, the God head of Ash has obvious advantages. Second reservoir dam power plant fly ash with the first two God is technically feasible, is to ensure the quality and quantity, and also save a certain amount of cement. Taiyuan, the use of ash is a certain risk. Still need to do a lot of feasibility studies. 4 mixed with God head = power plant fly ash mortar strength, cementitious material properties of concrete hydration heat and the mortar strength 4.1 Table 3 shows the first two God under different contents of ash mortar strength , can be seen from Table 3, fluidity while maintaining a certain condition. With the increase of fly ash, water-cement ratio decreases. Further evidence of the first two God of power plant fly ash has a prominent role in reducing water, when 60% of fly ash, water-cement ratio is only 0.38. Mortar strength of God than that the first two power plant fly ash with high activity, when mixed with 30% fly ash, the compressive strength ratio, 7d was 82.8%, 28d to 83.0%. 90d up to 94.9%. When mixed with 60% fly ash, 90d age compressive strength of up to 62.3%. 4.2 binder hydration can be seen from Table 4. 30% of fly ash mixed, making the heat was delayed; mixed with 60% fly ash. Can greatly reduce heat of hydration. 7d total calories as 96kJ/kg. Heat release only cement the 1 / 3.21
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