本文選題：蒸壓粉煤灰磚　切入點：蒸壓灰砂磚　出處：《長沙理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：長期以來,我國砌體材料采用燒結(jié)粘土磚作為主要墻體材料,為滿足量大面廣的燒結(jié)磚砌體既有建筑檢測鑒定需要,我國編訂了GB/T50315《砌體工程現(xiàn)場檢測技術(shù)標(biāo)準(zhǔn)》。隨著新型材料的推廣應(yīng)用,非燒結(jié)磚砌體得到廣泛應(yīng)用,研究非燒結(jié)磚砌體現(xiàn)場砂漿強度及其檢測方法具有十分重要的實用價值。對普通燒結(jié)磚,蒸壓粉煤灰磚,蒸壓灰砂磚進行單面吸水試驗。通過四種不同上墻含水率(0%,4%,8%和10%)磚的吸水試驗,研究單位面積吸水率與時間的關(guān)系,并運用毛細(xì)孔吸水動力學(xué)公式得出單位面積吸水率與時間平方根的關(guān)系,提出了吸水性指標(biāo)的概念、磚的上墻相對含水率與吸水性指標(biāo)S的關(guān)系,并結(jié)合已有的研究成果,通過回歸分析,得到不同磚在不同上墻含水率情況下吸水性指標(biāo)的計算公式。采用普通燒結(jié)磚,蒸壓粉煤灰磚,蒸壓灰砂磚,分別用砂漿強度等級為M2.5,M5,M10,砌筑12片墻體,養(yǎng)護后進行回彈法試驗,然后再進行筒壓法試驗。通過砌體現(xiàn)場砂漿試驗,建立了非燒結(jié)磚砌體現(xiàn)場砂漿強度的回彈法、筒壓法試驗方法,并得到了相應(yīng)檢測方法的砌體現(xiàn)場砂漿強度計算公式。建立砌體現(xiàn)場砂漿強度與磚的吸水性指標(biāo)的統(tǒng)一表達式。
[Abstract]:For a long time, the sintered clay brick is used as the main wall material in our country, in order to meet the needs of the existing building inspection and appraisal of the sintered brick masonry. In our country, GB/T50315 "Technical Standard for On-site Inspection of masonry Engineering" has been compiled. With the popularization and application of new materials, non-sintered brick masonry has been widely used. It is of great practical value to study the in-situ mortar strength of non-sintered brick masonry and its testing methods. The water absorption test of autoclaved lime-sand brick was carried out on one side. The relationship between water absorption rate per unit area and time was studied through the water absorption tests of four kinds of brick with different water content on the upper wall (4% and 10%). The relation between water absorption rate per unit area and square root of time is obtained by using capillary water absorption dynamics formula. The concept of water absorption index and the relation between relative moisture content of upper wall of brick and water absorption index S are put forward. Through regression analysis, the formula of water absorption index of different bricks under different water content of upper wall is obtained. Using common sintered brick, autoclaved pulverized coal brick and autoclaved lime sand brick, the strength grade of mortar is M2.5 / M5 / M10 respectively, and 12 walls are built. After curing, springback test was carried out, and then cylinder compression test was carried out. Based on the in-situ mortar test of masonry, the springback method and the cylindrical compression test method were established for the strength of non-sintered brick masonry mortar. A formula for calculating the strength of masonry mortar in situ is obtained, and the unified expression between the strength of mortar and the water absorption index of brick is established.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU578.1

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相關(guān)期刊論文 前1條

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本文編號：1568963