發(fā)布時間：2018-06-26 21:13

  本文選題：聚苯顆粒 + �；�微珠��； 參考：《濟南大學》2015年碩士論文

【摘要】：目前應用較為廣泛的聚苯顆粒保溫砂漿以及玻化微珠保溫砂漿存在一些不足之處。聚苯顆粒具有保溫隔熱性能優(yōu)良、耐化學腐蝕、不吸水、韌性大的優(yōu)點,但是其表面光滑、密度極低、強度低、憎水性強,與無機膠凝材料親和性差,需要大量外加劑改性。同時相對于無機輕骨料保溫砂漿而言,其抗燃燒性較差。�；�微珠保溫砂漿具有施工性好、抗壓強度高、耐候性好、防火性能優(yōu)良、抗裂性好等特點,但其制成的玻化微珠保溫砂漿導熱系數(shù)相對較高,吸水率較大。本文針對兩種保溫砂漿存在的問題,在聚苯顆粒保溫砂漿的基礎上,通過復摻聚苯顆粒與�；�微珠兩種保溫骨料的方法,綜合聚苯顆粒保溫砂漿和玻化微珠保溫砂漿兩種產(chǎn)品的性能優(yōu)點,研究了有機無機復合保溫砂漿組成設計和制備工藝,目的在于能夠制備工作性能好,物理力學性能和保溫性能優(yōu)異的復合保溫砂漿。研究結(jié)果表明:隨著集灰比的增大,聚苯顆粒保溫砂漿工作性能逐漸變差,干密度、抗壓強度降低,吸水率升高,軟化系數(shù)降低。礦物摻合料不僅可以改善拌合物工作性能,還可以顯著降低保溫砂漿的干密度,從而降低導熱系數(shù)。脫硫石膏可以起到激發(fā)摻合料化學活性的作用,從而避免了過多摻合料的摻入導致的保溫砂漿早期強度過低。復摻兩種骨料的比例對復合保溫砂漿的性能有重要影響,隨著玻化微珠取代量的增加,復合保溫砂漿干密度、抗壓強度、吸水率、軟化系數(shù)質(zhì)、質(zhì)量損失率均增大,這主要是�；�微珠具有容重大,強度高,吸水率大的特點,從而引起了復合保溫砂漿性能的變化。為了達到導熱系數(shù)的要求同時保證較高的強度,綜合考慮選擇�；�微珠與聚苯顆粒體積比為1:1。通過正交試驗的方法研究外加劑復合保溫砂漿性能影響規(guī)律。實驗結(jié)果證明可再分散乳膠粉、纖維素醚、引氣劑對保溫砂漿各項性能都有一定改善。極差分析發(fā)現(xiàn)對干密度和抗壓強度來說最重要的因素的引氣劑。經(jīng)過優(yōu)化實驗最終選擇組合A2B2C3,即可再分散乳膠粉摻量為3%,纖維素醚摻量為0.4%,引氣劑摻量為0.7%,此配合比下復合保溫砂漿抗壓強度為0.56MPa導熱系數(shù)達到0.0588W/(m?K)。萘系減水劑是影響復合保溫砂漿干密度和抗壓強度的重要因素。滿足工作性能、物理力學性能、保溫性能優(yōu)異的最佳組合A1B2C2,即萘系減水劑0.75%,憎水劑摻量為0.3%,聚丙烯纖維摻量為0.5%。此配合比下復合保溫砂漿抗壓強度為0.52MPa導熱系數(shù)達到0.0582W/(m?K)。我們國家幅員遼闊,氣候條件變化復雜。根據(jù)復摻骨料試驗,在不同氣候條件和節(jié)能要求地區(qū)使用不同骨料比例的復合保溫砂漿,控制不同容重,可以達到不同的保溫效果,并且在礦物摻合料及外加劑改性下獲得各項性能優(yōu)異的復合保溫砂漿,具有重要的現(xiàn)實意義。
[Abstract]:At present, there are some shortcomings in the widely used polystyrene particle insulation mortar and glass microbead insulation mortar. Polystyrene particles have the advantages of excellent thermal insulation, chemical corrosion resistance, no water absorption and high toughness, but their surface is smooth, density is extremely low, strength is low, hydrophobicity is strong, affinity with inorganic cementitious materials is poor, and a large number of additives are needed to modify it. At the same time, compared with inorganic lightweight aggregate thermal insulation mortar, its combustion resistance is poor. The glass microbead insulation mortar has the characteristics of good construction, high compressive strength, good weathering resistance, good fire resistance and good crack resistance, but the thermal conductivity and water absorption of the glass microbead insulating mortar are relatively high. In view of the problems existing in two kinds of insulating mortar, on the basis of polystyrene particle insulation mortar, two kinds of thermal insulation aggregate are mixed with polystyrene particle and vitrified microbead. In this paper, the composition design and preparation process of organic inorganic composite thermal insulation mortar are studied by synthesizing the performance advantages of polystyrene particle insulation mortar and glass microbead insulation mortar. The purpose of this paper is to prepare the composite thermal insulation mortar with good working performance. Composite thermal insulation mortar with excellent physical and mechanical properties and thermal insulation properties. The results show that with the increase of the ratio of aggregate to cement, the working performance of PBS becomes worse, the dry density and compressive strength decrease, the water absorption increases and the softening coefficient decreases. Mineral admixtures can not only improve the performance of the mixture, but also significantly reduce the dry density of the insulating mortar, thus reducing the thermal conductivity. Desulphurized gypsum can stimulate the chemical activity of the admixture, thus avoiding the low early strength of the thermal insulation mortar caused by the excessive addition of the admixture. The ratio of two kinds of aggregates has an important effect on the properties of composite insulating mortar. With the increase of the amount of glass microbeads, the dry density, compressive strength, water absorption, softening coefficient and mass loss rate of composite insulating mortar increase. This is mainly due to the large capacity, high strength and high water absorption of vitrified microbeads, which results in the change of properties of composite insulating mortar. In order to meet the requirement of thermal conductivity and ensure high strength, the volume ratio of glass beads to polystyrene particles is 1: 1. The effects of additives on the properties of composite thermal insulation mortar were studied by orthogonal test. The experimental results show that dispersible latex powder, cellulose ether and air entraining agent can improve the properties of insulating mortar to some extent. Range analysis shows that the most important factor for dry density and compressive strength is the air entraining agent. After the optimization experiment, the final selection of combination A 2B 2C 3 is that the amount of dispersed latex powder is 3, cellulose ether is 0.4 and air entraining agent is 0.7. The compressive strength of composite insulation mortar is 0.56MPa and the thermal conductivity is 0.0588W/ (mGK) under this mixture ratio. Naphthalene superplasticizer is an important factor affecting the dry density and compressive strength of composite insulating mortar. The optimum combination of A1B2C2, which can satisfy the performance of work, physical and mechanical properties and heat preservation, is 0.75 for naphthalene, 0.3 for hydrophobic agent and 0.5 for polypropylene fiber. The compressive strength of composite thermal insulation mortar is 0. 52 MPA, and the thermal conductivity is 0. 058 2 W / (MK). Our country has a vast territory and complex climatic conditions. According to the experiment of admixture aggregate, different heat preservation mortar with different aggregate ratio can be used in different climate conditions and energy saving requirement areas, and different bulk density can be controlled, and different thermal insulation effect can be achieved. And it is of great practical significance to obtain composite thermal insulation mortar with excellent properties under the modification of mineral admixture and admixture.
【學位授予單位】：濟南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU578.1;TB33

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相關(guān)期刊論文 前1條

1 張繼媛;張聯(lián)英;王灃浩;;外墻保溫技術(shù)的研究現(xiàn)狀與發(fā)展趨勢[J];建筑節(jié)能;2010年01期

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本文編號：2071433