本文選題：實體混凝土強度 + 摻合料��； 參考：《哈爾濱工業(yè)大學》2014年碩士論文

【摘要】：為進一步加強對建筑工程質(zhì)量的監(jiān)督和管理，基于“驗評分離、強化驗收、完善手段、過程控制”的指導原則，諸多機構(gòu)開展專題研究、工程試點應(yīng)用以及廣泛的實踐調(diào)查，本試驗在哈爾濱、海南、浙江、北京等地以相同標準對此展開探索和研究。 由于“標準養(yǎng)護試件”和實際結(jié)構(gòu)構(gòu)件的成型方式、尺寸大小、養(yǎng)護條件（溫、濕度）等明顯不同，“標準養(yǎng)護試件強度”實為一種“材料強度”，而不是“結(jié)構(gòu)強度”，不能確切地代表結(jié)構(gòu)實體混凝土的實際質(zhì)量情況。因此，結(jié)構(gòu)實體混凝土強度越來越受到人們重視，它是工程施工質(zhì)量驗收、鑒定加固、事故評估分析等方面重要參考指標之一。然而，工程現(xiàn)場對混凝土強度的檢測多數(shù)僅采用單一的強度測定方法，并且采用不同方法所得出的結(jié)論不盡相同，，不能很好地適應(yīng)工程質(zhì)量驗收標準的要求。特別是礦物摻合料混凝土強度的檢測與評定研究較少，科學、可靠地評定結(jié)構(gòu)實體混凝土強度對完善工程質(zhì)量驗收理論具有重要意義。為此，本試驗對C30、C40、C50、C60四種強度等級的礦物摻合料混凝土（包括單摻粉煤灰混凝土、復摻粉煤灰和礦渣混凝土）進行研究，分析不同齡期下“標準養(yǎng)護試件強度”、“同條件養(yǎng)護試件強度”以及用“回彈法”與“鉆芯法”分別獲得的結(jié)構(gòu)混凝土“推定強度”之間的相互關(guān)系；同時，分析了混凝土各類強度隨等效齡期的增長規(guī)律。 試驗表明，單摻粉煤灰混凝土、復摻粉煤灰和礦渣混凝土的強度發(fā)展規(guī)律相近；在等效齡期為28d（成熟度為600oC d）時，摻合料混凝土的“同條件養(yǎng)護試件強度”、“結(jié)構(gòu)混凝土回彈強度”和“結(jié)構(gòu)混凝土取芯強度”均達不到28d的標準養(yǎng)護試件強度；對于摻合料混凝土，“同條件養(yǎng)護試件強度”可以代表“結(jié)構(gòu)混凝取芯強度”來進行結(jié)構(gòu)實體混凝土強度檢驗；還顯示，直徑為50mm、75mm、100mm的混凝土芯樣強度基本相同。 同時，摻合料混凝土的各類檢測強度隨齡期的變化呈對數(shù)增長趨勢，并指出，為了達到規(guī)范對普通混凝土強度檢驗要求的標準，結(jié)構(gòu)實體摻合料混凝土強度的檢測齡期應(yīng)適當延長；或者，在保證與普通混凝土強度檢驗齡期相同時，降低摻合料混凝土強度檢測標準。通過把因地域差異而產(chǎn)生的不同試驗結(jié)果綜合分析，為新修訂的國家標準《混凝土結(jié)構(gòu)工程施工質(zhì)量驗收規(guī)范》(GB50204-2002)提供依據(jù)。
[Abstract]:In order to further strengthen the supervision and management of construction engineering quality, based on the guiding principles of "score separation, strengthen acceptance, perfect means, process control", many institutions carry out special research, project pilot application and extensive practical investigation. This test was carried out in Harbin, Hainan, Zhejiang, Beijing and other places with the same standards. Due to the obvious differences in the molding methods, dimensions, curing conditions (temperature, humidity) between the "standard curing specimens" and the actual structural members, "strength of standard curing specimen" is actually a kind of "material strength" rather than "structural strength", which can not represent the actual quality of concrete. Therefore, more and more attention has been paid to the strength of structural concrete, which is one of the important reference indexes in engineering construction quality acceptance, appraisal and reinforcement, accident assessment and analysis, etc. However, most of the concrete strength tests in the engineering field only use a single strength measurement method, and the conclusions obtained by different methods are different, which can not meet the requirements of engineering quality acceptance standards. Especially, the research on the testing and evaluation of concrete strength with mineral admixtures is less. It is of great significance to evaluate the strength of concrete with solid structure scientifically and reliably in order to improve the acceptance theory of engineering quality. In this paper, four kinds of mineral admixture concrete (single fly ash concrete, mixed fly ash concrete and slag concrete) with four strength grades, C30, C40, C50 and C60, are studied, and the "strength of standard curing specimen" at different ages is analyzed. The relationship between the strength of the specimen under the same condition and the constructive strength of the structural concrete obtained by the springback method and the drill core method respectively; at the same time, The increasing law of concrete strength with equivalent age is analyzed. The test results show that the strength development law of concrete with fly ash is similar to that of slag concrete, and when the equivalent age is 28 days (maturity is 600oC d), The strength of "curing specimen under the same condition", "rebound strength of structural concrete" and "coring strength of structural concrete" of admixture concrete are not up to the standard curing strength of 28 days. "strength of the specimen under the same condition" can be used to test the strength of solid concrete on behalf of "core strength of structure coagulation", and it is also shown that the strength of concrete core sample with diameter of 50mm to 75mm or 100mm is basically the same. At the same time, The testing strength of admixture concrete has a logarithmic increasing trend with age. It is pointed out that in order to meet the standard of normal concrete strength test, the testing age of structural concrete admixture strength should be extended properly. Or, at the same time as the normal concrete strength test age, reduce the admixture concrete strength detection standard. Through the comprehensive analysis of the different test results due to the regional differences, this paper provides the basis for the newly revised national standard < Code for acceptance of Construction quality of concrete structure Engineering > GB50204-2002).
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU528

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