本文選題：商品砂漿 + 測(cè)強(qiáng)曲線��； 參考：《石家莊鐵道大學(xué)》2015年碩士論文

【摘要】：目前,商品砂漿在石家莊地區(qū)得到了廣泛應(yīng)用,回彈法又是現(xiàn)場(chǎng)檢測(cè)砂漿強(qiáng)度的最常用的方法之一,目前推廣的砂漿回彈曲線在現(xiàn)場(chǎng)拌制砂漿的實(shí)體檢測(cè)中應(yīng)用廣泛,但是該曲線是否適合商品砂漿還有待研究,因此,采用回彈法測(cè)試現(xiàn)場(chǎng)商品砂漿砌體的強(qiáng)度,并建立相應(yīng)的測(cè)強(qiáng)曲線這個(gè)課題應(yīng)運(yùn)而生。本文選取石家莊地區(qū)有代表性的三家商品砂漿進(jìn)行系統(tǒng)研究,首先通過試驗(yàn)測(cè)定了不同強(qiáng)度等級(jí)不同齡期的商品砂漿在自然條件下砂漿試塊的碳化深度值、回彈強(qiáng)度值和抗壓強(qiáng)度值,然后分析自然養(yǎng)護(hù)試塊的碳化深度、回彈強(qiáng)度值與抗壓強(qiáng)度值三者之間的關(guān)系。試驗(yàn)結(jié)果表明,商品砂漿試塊在自然條件下養(yǎng)護(hù)的碳化深度值均超過3 rrm,通過數(shù)據(jù)和函數(shù)圖形的分析表明碳化深度值對(duì)商品砂漿抗壓強(qiáng)度的影響很小。由此在后面的研究中可忽略碳化深度對(duì)回彈值的影響。然后,根據(jù)試驗(yàn)測(cè)得的回彈值和抗壓強(qiáng)度值分別建立了線性函數(shù)關(guān)系曲線、對(duì)數(shù)函數(shù)關(guān)系曲線、多項(xiàng)式函數(shù)關(guān)系曲線、冪函數(shù)關(guān)系曲線以及指數(shù)函數(shù)關(guān)系曲線,對(duì)所建立的5個(gè)函數(shù)曲線的相關(guān)系數(shù)進(jìn)行比較,確定相關(guān)性最大的是冪函數(shù)關(guān)系曲線,即y=0.0001x3.39,R2=0.9289確定為石家莊地區(qū)商品砂漿回彈法的測(cè)強(qiáng)曲線。最后,通過現(xiàn)場(chǎng)工程墻體實(shí)測(cè)回彈值和同部位砌體砂漿試塊抗壓強(qiáng)度值進(jìn)行驗(yàn)證,以該曲線計(jì)算的抗壓強(qiáng)度值的平均相對(duì)誤差為11.29%,平均標(biāo)準(zhǔn)差為7.60滿足平均相對(duì)誤差不大于±14.0%相對(duì)標(biāo)準(zhǔn)差不大于17.0%的要求。
[Abstract]:At present, commercial mortar has been widely used in Shijiazhuang area, and springback method is one of the most commonly used methods to detect mortar strength in the field. However, whether the curve is suitable for commercial mortar is still to be studied. Therefore, the springback method is used to test the strength of commercial mortar masonry in the field and the corresponding strength curve is established. In this paper, three representative commercial mortars in Shijiazhuang area are selected for systematic study. Firstly, the carbonation depth of commercial mortar with different strength grades and ages under natural conditions is measured. The relationship among carbonation depth, springback strength and compressive strength is analyzed. The experimental results show that the carbonation depth values of commercial mortar samples cured under natural conditions are above 3 rms. the analysis of data and function patterns shows that the carbonation depth values have little effect on the compressive strength of commercial mortar. Therefore, the effect of carbonation depth on springback can be ignored in the later study. Then, the linear function curve, logarithmic function curve, polynomial function curve, power function relation curve and exponential function relation curve are established according to the springback and compressive strength measured in the experiment. By comparing the correlation coefficients of the five function curves established, it is found that the most significant correlation is the power function curve, that is, the strength curve of the rebound method of commercial mortar in Shijiazhuang area is determined to be YY 0.0001x3.39R20.9289. Finally, it is verified by the measured springback value of the field engineering wall and the compressive strength value of the same site masonry mortar test block. The average relative error of compressive strength calculated by this curve is 11.29 and the average standard deviation is 7.60. The average relative error is not greater than 鹵14.0% and the relative standard deviation is not greater than 17.0%.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ177.6

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本文編號(hào)：1899193