本文選題：輕集料 + 保溫��； 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：建筑能耗占社會(huì)總體能耗的1/3左右，建筑能耗不只是建筑建設(shè)過(guò)程中的能耗，還包含了整個(gè)使用壽命期間內(nèi)照明、空調(diào)、暖氣等的能耗。因此建筑節(jié)能技術(shù)成為降低總體能耗的重要手段。 重慶地區(qū)已經(jīng)執(zhí)行國(guó)家65%的節(jié)能標(biāo)準(zhǔn)，并且重慶屬夏熱冬冷地區(qū)，除一些辦公大樓外，居民樓一般沒(méi)有統(tǒng)一供冷、供熱系統(tǒng)，而是采用分戶采暖、制冷。居民對(duì)室內(nèi)溫度要求的差異化，使得能量不僅在室內(nèi)外傳遞，，也在層樓板之間傳遞，因此要達(dá)到65%的節(jié)能標(biāo)準(zhǔn)，不僅要做墻面保溫系統(tǒng)，而且要做樓板保溫體系。 重慶地區(qū)已經(jīng)在樓面保溫中大規(guī)模應(yīng)用全輕混凝土，由于陶粒是多孔結(jié)構(gòu)，密度比水小，導(dǎo)致全輕混凝土施工過(guò)程中集料易上浮，并且和易性差、易泌水。針對(duì)這些問(wèn)題，采用配合比改進(jìn)、添加外加劑等加以改進(jìn)。本次實(shí)驗(yàn)主要研究了陶粒性能、砂率、X微珠、粉煤灰漂珠、纖維素醚、減水劑等對(duì)全輕混凝土的強(qiáng)度、干密度、和易性等的影響。 研究結(jié)果表明陶粒的性能對(duì)全輕混凝土強(qiáng)度的影響較為顯著，陶粒強(qiáng)度增加0.8MPa，帶來(lái)強(qiáng)度的增長(zhǎng)為陶粒強(qiáng)度增長(zhǎng)的3—4倍，在相同砂率、相同塌落度情況下，球型陶�；炷翉�(qiáng)度高于碎石型陶粒；全輕混凝土強(qiáng)度、干密度隨砂率的變化規(guī)律相似，均為先增大后降低；X微珠、粉煤灰漂珠等更輕質(zhì)、高強(qiáng)的細(xì)集料能顯著降低全輕混凝土的干密度，在一定摻量下能夠提高其強(qiáng)度。 陶粒浸水對(duì)全輕混凝土的強(qiáng)度不利，而裹漿工藝基本無(wú)影響；萘系減水劑對(duì)全輕混凝土基本無(wú)明顯影響，而聚羧酸減水劑能顯著的提高全輕混凝土的強(qiáng)度，但由于水膠比的降低，密實(shí)度的增大，使其干密度有所增加，其適宜摻量在水泥量的0.7%—1.2%之間。提高水泥標(biāo)號(hào)，即單純提高水泥漿體的強(qiáng)度對(duì)全輕混凝土強(qiáng)度提高不大。 纖維素醚能顯著改善全輕混凝土的和易性，對(duì)于球型陶粒來(lái)說(shuō)其最佳摻量約為水泥量的0.2%，對(duì)碎石型陶�；炷羴�(lái)說(shuō)，其最佳摻量為0.4%。 全輕混凝土的研究成果已在實(shí)際工程中應(yīng)用，總體結(jié)果令人滿意，基本無(wú)空鼓、開(kāi)裂問(wèn)題。
[Abstract]:Building energy consumption accounts for about a third of the total energy consumption of society. Building energy consumption is not only energy consumption in the process of building construction, but also the energy consumption of lighting, air conditioning, heating and so on during the whole life span. Therefore, building energy saving technology has become an important means to reduce the overall energy consumption. Chongqing area has implemented the national energy saving standard of 65%, and Chongqing is a hot summer and cold winter area, except for some office buildings, residential buildings generally do not have a unified cooling, heating system, but the use of household heating, refrigeration. The difference of indoor temperature requirements makes the energy transfer not only between indoor and outdoor, but also between floors and floors. Therefore, to achieve the energy saving standard of 65%, not only the wall insulation system, but also the floor insulation system should be made. The whole light concrete has been widely used in floor heat preservation in Chongqing area. Due to its porous structure and smaller density than water, aggregates are easy to float and easy to bleed in the construction process of whole light concrete. In order to solve these problems, mix ratio improvement and admixture are used to improve it. The effects of ceramsite properties, sand ratio X beads, fly ash beads, cellulose ether and water reducer on the strength, dry density and easiness of whole light concrete were studied in this experiment. The results show that the performance of ceramsite has a significant effect on the strength of whole light concrete. The strength of ceramic particle increases by 0.8 MPa, and the increase of strength is 3-4 times of that of the strength of ceramsite. Under the same sand ratio and the same collapse degree, The strength of spherical ceramsite concrete is higher than that of gravel type ceramsite, and the change of strength and dry density with sand rate is similar to that of full light concrete, all of which are light weight, such as increasing first and then reducing X microbeads, fly ash dripping beads, etc. The high strength fine aggregate can significantly reduce the dry density of the whole light concrete, and can improve its strength in a certain amount. Water immersion of ceramsite has no effect on the strength of whole light concrete, but no effect on grouting process, while naphthalene water reducing agent has no obvious effect on the whole light weight concrete, while polycarboxylic acid water reducing agent can significantly improve the strength of whole light concrete. Due to the decrease of water-binder ratio and the increase of compactness, the dry density of the cement is increased, and its suitable content is between 0.7% and 1.2% of the cement content. Increasing cement grade, that is, increasing the strength of cement paste, does not improve the strength of whole light concrete. Cellulose ether can significantly improve the easiness of the whole light concrete. For spherical ceramsite, the optimum content is about 0.2 of the cement content, and for crushed stone type ceramsite concrete, the optimum content is 0.4. The research results of all-light concrete have been applied in practical engineering, the overall results are satisfactory, there is basically no empty drum, cracking problem.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU528

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