本文關(guān)鍵詞： 回彈法 蒸壓粉煤灰磚 影響因素 抗壓強(qiáng)度 回彈測強(qiáng)曲線　出處：《湖南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：改革開放以來,隨著保護(hù)耕地、建筑節(jié)能以及環(huán)境保護(hù)等政策的實行,非燒結(jié)磚的發(fā)展日益成熟,回彈法的應(yīng)用也越來越廣泛�；貜椃ㄊ钱�(dāng)下一種常見的現(xiàn)場檢測技術(shù)方法,即使用一個靠彈簧驅(qū)動的彈擊錘彈擊材料表面,得到并記錄回彈值,得到的回彈值用來作為與抗壓強(qiáng)度具有相關(guān)性的指標(biāo)用來推定塊材抗壓強(qiáng)度的一種現(xiàn)場檢測技術(shù)方法。該檢測方法具有檢測費用低、可檢測范圍廣和非破損性現(xiàn)場檢測等特點。我國的相關(guān)部門制定回彈法檢測混凝土和燒結(jié)磚強(qiáng)度的國家和地方標(biāo)準(zhǔn),但是,關(guān)于回彈法檢測非燒結(jié)磚的測強(qiáng)公式并未在我國相關(guān)標(biāo)準(zhǔn)中給出。我國進(jìn)入“十二五”規(guī)劃以來,環(huán)境治理問題越來越成為我們關(guān)注的焦點問題,同時也是迫切需要解決的問題之一。我國的粉煤灰年排放量有逐年遞增的趨勢,在早在1994年我國家就頒布了《粉煤灰綜合利用管理辦法》,明確了對粉煤灰的處理過程中采用“以用為主”的指導(dǎo)精神。由于在蒸壓粉煤灰磚的制作過程中,影響成品磚的因素較多而各個地區(qū)用于制作蒸壓粉煤灰磚的原料處理程度和設(shè)備水平又參差不齊,給該種磚的性能研究和探索造成了一定的影響。綜上所述,建立砌體中蒸壓粉煤灰磚湖南地區(qū)的回彈測強(qiáng)曲線就顯得非常具有必要性。本篇論文通過一系列試驗和數(shù)據(jù)統(tǒng)計分析,采用統(tǒng)計學(xué)原理,得到適用于砌體中蒸壓粉煤灰磚的湖南地區(qū)回彈測強(qiáng)曲線,屬于《非燒結(jié)磚砌體現(xiàn)場檢測技術(shù)規(guī)程》的系列成果之一。本文所做工作如下:(1)論述了蒸壓粉煤灰磚的發(fā)展歷程、特點以及應(yīng)用前景,并總結(jié)歸納回彈法測定砌體中蒸壓粉煤灰磚抗壓強(qiáng)度的原理和影響回彈值的主要因素。(2)通過湖南大學(xué)制作的的蒸壓粉煤灰磚標(biāo)準(zhǔn)試件進(jìn)行試驗,對不同等級的豎向壓力、砂漿、試驗方法、含水率和碳化深度對于回彈值的影響機(jī)理進(jìn)行了實驗研究。(3)通過試驗共得到348組回彈值和抗壓強(qiáng)度值原始數(shù)據(jù),將其進(jìn)行分組后共得到42組相互匹配的回彈平均值與抗壓強(qiáng)度平均值數(shù)組。利用Origin軟件,按照最小二乘法原理對得到的回彈值-抗壓強(qiáng)度匹配數(shù)組進(jìn)行回歸擬合,建立以冪函數(shù)式表達(dá)的適用于蒸壓粉煤灰磚的湖南地區(qū)回彈測強(qiáng)曲線。驗證性實驗表明,本文所得到的砌體中蒸壓粉煤灰磚湖南地區(qū)回彈測強(qiáng)曲線精度較高,可為《非燒結(jié)磚砌體現(xiàn)場檢測技術(shù)規(guī)程》的編纂提供試驗支持和數(shù)據(jù)支撐。
[Abstract]:Since the reform and opening up, with the implementation of the policies of protecting cultivated land, building energy saving and environmental protection, the development of non-sintered bricks has become increasingly mature, and the springback method has been used more and more widely. Even if a spring-driven hammer is used to bounce the surface of the material, the springback value is obtained and recorded. The springback value obtained is used as an index related to compressive strength to be used to predict the compressive strength of blocks. The relevant departments of our country have formulated national and local standards for rebound testing of strength of concrete and sintered bricks, but, The formula for measuring the strength of non-sintered bricks by rebound method has not been given in the relevant standards of our country. Since China entered the 12th Five-Year Plan, environmental governance has become the focus of our attention. At the same time, it is one of the urgent problems that need to be solved. The annual emissions of fly ash in China are increasing year by year. As early as 1994, our country promulgated the "Comprehensive Utilization of fly Ash Management method", which made clear the guiding spirit of "using mainly" in the treatment of fly ash. As a result, in the production process of autoclaved pulverized coal brick, There are many factors affecting the finished brick, and the raw material treatment degree and equipment level of the autoclaved fly ash brick are not uniform, which has a certain influence on the research and exploration of the properties of this kind of brick. It is necessary to set up the rebound strength curve of autoclaved pulverized coal brick in Hunan area. This paper adopts the statistical principle through a series of tests and statistical analysis of data. The rebound strength curve of autoclaved pulverized coal brick in Hunan is obtained, which belongs to one of the series of achievements of "technical specification for on-site detection of unsintered brick masonry". The work done in this paper is as follows: 1) the development course of autoclaved pulverized coal brick is discussed. Characteristics and application prospects, and summarizes the principle of determining the compressive strength of autoclaved pulverized coal brick in masonry by springback method and the main factors influencing the resilience value. The test is carried out through the standard sample of autoclaved pulverized coal brick made by Hunan University. The influence mechanism of different levels of vertical pressure, mortar, test method, moisture content and carbonation depth on the springback value is studied experimentally. After grouping, 42 groups of matching array of springback average and compressive strength are obtained. By using Origin software, the springback and compressive strength matching array are regressed according to the principle of least square method. The springback strength curve of autoclaved pulverized coal brick in Hunan province is established by power function. The verification experiment shows that the precision of rebound strength measurement curve of autoclaved fly ash brick in Hunan area is higher than that obtained in this paper. It can provide experimental support and data support for the compilation of Non-Sintering Brick masonry site Inspection Technical Specification.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU522

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