發(fā)布時(shí)間：2018-04-19 23:04

  本文選題：超低密度泡沫混凝土 + 硫鋁酸鹽水泥　； 參考：《湖南大學(xué)》2013年碩士論文

【摘要】：泡沫混凝土作為一種輕質(zhì)多孔材料，具有輕質(zhì)、保溫隔熱性能好、防火性能優(yōu)良等特點(diǎn)，已廣泛應(yīng)用于建筑工程。眾所周知，泡沫混凝土的密度越小，導(dǎo)熱系數(shù)越低，保溫隔熱效果也越好。因此，泡沫混凝土作為一種無(wú)機(jī)保溫材料，其優(yōu)異的保溫隔熱性能，預(yù)示著超低密度泡沫混凝土產(chǎn)品的研發(fā)必將是泡沫混凝土行業(yè)未來(lái)的一個(gè)發(fā)展方向。然而，超低密度泡沫混凝土目前大多采用硫鋁酸鹽等特種水泥來(lái)生產(chǎn)，相對(duì)普通硅酸鹽水泥來(lái)說(shuō)，特種水泥的成本高，，因而阻礙了超低密度泡沫混凝土作為保溫材料的進(jìn)一步發(fā)展。為了解決這一問(wèn)題，本課題研究開發(fā)以普通硅酸鹽水泥為主要膠凝材料的超低密度泡沫混凝土；另外，為了獲得更加優(yōu)異的保溫性能，旨在研制出密度等級(jí)100kg/m3以下的超低密度泡沫混凝土。 本試驗(yàn)研究了水泥品種、水灰比、礦物摻合料以及溫度對(duì)超低密度泡沫混凝土的影響。試驗(yàn)結(jié)果表明，采用硫鋁酸鹽水泥，在實(shí)驗(yàn)室中可以研制出干密度87.7kg/m3的超低密度泡沫混凝土。在保持硫鋁酸鹽水泥摻量為7.5%的情況下，以硅酸鹽水泥為主要膠凝材料，探究了硅灰、早強(qiáng)劑、纖維素醚和聚丙烯纖維對(duì)普硅-硫鋁泡沫混凝土抗壓強(qiáng)度的影響。試驗(yàn)結(jié)果表明：在密度等級(jí)為400kg/m3，當(dāng)甲基纖維素和聚丙烯纖維的摻量為0.2%時(shí)，能大大提高泡沫混凝土的抗壓強(qiáng)度，此時(shí)其抗壓強(qiáng)度可高達(dá)1.34MPa，高于同密度等級(jí)下快硬硫鋁酸鹽水泥泡沫混凝土，也遠(yuǎn)高于市場(chǎng)同類產(chǎn)品。 此外，試驗(yàn)還研究了泡沫混凝土干密度與抗壓強(qiáng)度和導(dǎo)熱系數(shù)之間的關(guān)系。試驗(yàn)結(jié)果表明：泡沫混凝土干密度越小，抗壓強(qiáng)度越低，導(dǎo)熱系數(shù)越小。另外，通過(guò)孔結(jié)構(gòu)研究，分析了泡沫混凝土氣孔結(jié)構(gòu)與強(qiáng)度之間的關(guān)系，結(jié)果表明：孔徑越小，分布越均勻，其抗壓強(qiáng)度越高。
[Abstract]:Foam concrete, as a light porous material, has the characteristics of light quality, good heat insulation and heat insulation, good fire resistance and so on. It has been widely used in construction engineering. It is known that the smaller the density of the foam concrete, the lower the thermal conductivity, the better the heat insulation effect. Therefore, the foam concrete is a kind of inorganic insulation material, and its excellent protection is guaranteed. The performance of thermal insulation indicates that the research and development of super low density foam concrete product will be a future development direction of foam concrete industry. However, most of ultra-low density foam concrete is produced by special cement such as sulphate and aluminate, and the cost of special cement is higher than that of ordinary portland cement, which hinders the ultra low density. In order to solve this problem, this subject studies and develops ultra low density foam concrete with ordinary portland cement as the main cementitious material. In addition, in order to obtain more excellent thermal insulation performance, the purpose of developing super low density foam concrete below 100kg/m3 density grade is to develop.
The effect of cement variety, water cement ratio, mineral admixture and temperature on ultra-low density foam concrete was studied in this experiment. The experimental results show that the ultra low density foam concrete with dry density 87.7kg/m3 can be developed in the laboratory by using sulphoaluminate cement. In the case of keeping the content of thioaluminate cement 7.5%, the silicate salt water is used. As the main cementitious material, the effect of silica fume, early strength agent, cellulose ether and polypropylene fiber on the compressive strength of pericosulfate aluminum foam concrete is investigated. The test results show that the compressive strength of the foam concrete can be greatly increased when the density grade is 400kg/m3, when the dosage of methyl cellulose and polypropylene fiber is 0.2%, the compression strength of the foam concrete can be greatly improved. The strength can be as high as 1.34MPa, higher than that of fast hardening sulphoaluminate cement foam concrete under the same density level, which is much higher than that of similar products in the market.
In addition, the relationship between the dry density of the foam concrete and the compressive strength and the thermal conductivity is also studied. The test results show that the smaller the dry density of the foam concrete is, the lower the compressive strength and the smaller the thermal conductivity. In addition, the relationship between the pore structure and the strength of the foam concrete is analyzed by the pore structure. The results show that the more pore size is, the more pore size is. The more uniform the distribution is, the higher the compressive strength.

【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU528.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李相國(guó);劉敏;馬保國(guó);蹇守衛(wèi);蘇雷;趙志廣;;孔結(jié)構(gòu)對(duì)泡沫混凝土性能的影響與控制技術(shù)[J];材料導(dǎo)報(bào);2012年07期

2 張介軒;微硅粉的應(yīng)用及其捕集[J];城市管理與科技;2001年03期

3 譚月華;發(fā)展多孔混凝土促進(jìn)墻材革新[J];房材與應(yīng)用;2003年01期

4 常婧瑩;淺談泡沫混凝土在建筑中的應(yīng)用[J];房材與應(yīng)用(材料·結(jié)構(gòu));2005年04期

5 張澤平;李珠;董彥莉;;建筑保溫節(jié)能墻體的發(fā)展現(xiàn)狀與展望[J];工程力學(xué);2007年S2期

6 方永浩;王銳;龐二波;周s

本文編號(hào)：1775116