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Construction of concrete structures often result in mold components reinforced concrete structure that is less than perfect, resulting thermodynamics steam tables in a porous parts, shaped like a beehive (honey comb) or even completely hollow. Concrete structure with parts that are less than perfect is unacceptable because it certainly will not be able to meet the future requirements of power in her maid. Not infrequent structures such defects are not acceptable and torn down, and then built back better. This means a huge waste of money. The purpose of this study is to find ways to improve the structure of concrete honeycomb containing bone or other defects without prior demolish all or most of the structure. Part of the structure prior unblemished carved to throw off the parts and make room or a hole big enough. Then, if necessary, could be improved thermodynamics steam tables or added reinforcement as appropriate and coarse aggregate is loaded thermodynamics steam tables into the hole. After given the cover molds to taste, is injected into the hole (grouting) fluid mixture of cement with various thermodynamics steam tables additives (additives). Concrete is produced in this way are called Aggregate concrete-PrePak (AP Concrete). Concrete manufacturing techniques to repair damage to the structure is then developed becoming the new technologies in the production of concrete thermodynamics steam tables building new structures or components. But along with the development of these technologies, develops a range of issues that must be addressed, such as the quality and properties thermodynamics steam tables of concrete materials are produced by means of injection, except aggregate quality, highly influenced by the quality of liquid cement (grout).
In this study grout mixture obtained from the spiked water and cement additives such as fly ash from coal-fired power plant waste and scour various slag from the steel industry and nickel. In addition, to improve its viscosity despite using a little water, adding chemical additives thermodynamics steam tables like superplasticizer. AP concrete thermodynamics steam tables production technology with the fly ash to produce concrete with a strength of 52.7 MPa at the age of 90 days, which is more than 2 times the concrete used in the concrete structure of the normal thermodynamics steam tables bone and was still far above the usual strength of prestressed concrete required, the compressive strength of 35 -45 MPa.
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Use of Spiral Reinforcement for Concrete Columns Repair Earthquake Affected
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