人工合成發(fā)泡劑的制備及其對(duì)泡沫混凝土的影響評(píng)價(jià)
發(fā)布時(shí)間：2018-08-07 14:25
【摘要】：本文的目的是設(shè)計(jì)一種含有有機(jī)溶劑及合成表面活性劑的發(fā)泡劑,并研究其在砂漿中的性能。此種發(fā)泡劑和減水劑、不同摻量的偏高嶺土、納米二氧化鈦一起被用于制備高密度泡沫混凝土(密度大于1600kg/m3),同時(shí)在不同養(yǎng)護(hù)條件下研究了該泡沫混凝土的性能如吸水率、抗壓強(qiáng)度等。發(fā)泡劑基于一種含有疏水及親水性基團(tuán)的兩親性有機(jī)化合物的合成表面活性劑合成,表面活性劑的主要目的是降低水的表面張力,從而使得高速壓縮空氣和起泡劑溶液在高密度區(qū)域混合情況下更容易產(chǎn)生這種發(fā)泡劑由月桂醇硫酸酯鈉鹽、乙醇、十二醇和水合成,在水和空氣稀釋下其會(huì)產(chǎn)生穩(wěn)定的泡沫,本文研究了泡沫的一些性能如稀釋比例、密度、工作能力和排水能力。用機(jī)械方法將泡沫引入到砂漿中制備泡沫混凝土,研究了混凝土的密度穩(wěn)定性、抗壓強(qiáng)度和吸水性。測(cè)試結(jié)果表明,在最佳稀釋比例1:40的條件下泡沫的初密度為104 kg/m3,混凝土的密度從450kg/m3至1950kg/m3不等,其抗壓強(qiáng)度在0.5-23Mpa間變化。同Eabassoc發(fā)泡劑相比,此種發(fā)泡劑制備泡沫的加入使得泡沫混凝土的28d強(qiáng)度更高。根據(jù)ASTM 869-91,該化學(xué)成分比例可用于制備合格的發(fā)泡劑。在證實(shí)了發(fā)泡劑的合格性后,用該發(fā)泡劑制備的泡沫和不同摻量的偏高嶺土及納米二氧化鈦來制備高密度泡沫混凝土(密度大于1600kg/m3),并研究了養(yǎng)護(hù)條件對(duì)其抗壓強(qiáng)度和吸水性的影響。試樣分別在室溫25±2oC下空氣中養(yǎng)護(hù)、25±2oC下浸水養(yǎng)護(hù)、80±2oC的烘箱中養(yǎng)護(hù)及80±2oC下蒸養(yǎng),偏高嶺土摻量分別%,10%和15%,納米二氧化鈦摻量分別1,2,3,4,5%。通過實(shí)驗(yàn)來探究養(yǎng)護(hù)條件、偏高嶺土、納米二氧化鈦及偏高嶺土和納米二氧化鈦復(fù)合對(duì)混凝土吸水性和抗壓強(qiáng)度的影響。比較只摻納米二氧化鈦(C2)和未摻納米二氧化鈦和偏高嶺土(C1)的試樣,試驗(yàn)結(jié)果表明相比于其它養(yǎng)護(hù)條件如高溫養(yǎng)護(hù)、蒸養(yǎng)、空氣中養(yǎng)護(hù)、浸水養(yǎng)護(hù),水養(yǎng)條件下C1及C2的3d強(qiáng)度最高。相較于C1,只摻有納米二氧化鈦的試樣C2的吸水性及強(qiáng)度最低。未摻納米二氧化鈦及偏高嶺土的試樣C1的28d強(qiáng)度高于摻有3%納米二氧化鈦的試樣C2。C3,C4,C5分別只摻有5%,10%,15%的偏高嶺土。比較C3,C4,C5試樣的試驗(yàn)結(jié)果,試樣28d強(qiáng)度最高的偏高嶺土最佳摻量為10%,特別是水中養(yǎng)護(hù)的試樣。水養(yǎng)3d試樣的吸水性隨著偏高嶺土摻量的增加而增加。試樣C6,C7,C8,C9,C10復(fù)摻有偏高嶺土和納米二氧化鈦,其中偏高嶺土的摻量固定為10%,納米二氧化鈦的摻量分別為1%,2%,3%,4%,5%。試驗(yàn)結(jié)果顯示,能使得試樣28d強(qiáng)度最高的最佳摻量為10%偏高嶺土和3%納米二氧化鈦。所有的試樣水養(yǎng)條件下的強(qiáng)度最高,蒸養(yǎng)條件下的強(qiáng)度次之,高溫養(yǎng)護(hù)條件下的強(qiáng)度最低。試驗(yàn)結(jié)果也指出,隨著強(qiáng)度的增加試樣的吸水率也隨之增加,其中高溫養(yǎng)護(hù)條件下試樣的吸水率最低,蒸養(yǎng)條件下試樣的吸水率次之,水養(yǎng)條件下試樣的吸水率最大。
[Abstract]:The purpose of this paper is to design a foaming agent containing organic solvents and synthetic surfactants and to study its properties in mortar. This kind of foaming agent, water reducing agent, different amount of metakaolin, nanometer titanium dioxide are used to prepare high density foam concrete (density greater than 1600kg/m3) together. At the same time, the properties of the foam concrete such as water absorption are studied under different curing conditions. Compressive strength, etc. The foaming agent is based on the synthesis of an amphiphilic organic compound containing hydrophobic and hydrophilic groups, the main purpose of which is to reduce the surface tension of water. This makes it easier to produce this foaming agent from sodium lauryl sulfate, ethanol, dodecanol and water when the high speed compressed air and foaming agent solution is mixed in a high density region, and when diluted with water and air, it produces a stable foam. Some properties of foam, such as dilution ratio, density, working capacity and drainage capacity, are studied in this paper. Foam concrete was prepared by mechanical method. The density stability, compressive strength and water absorption of concrete were studied. The results show that the initial density of foam is 104kg / m ~ (3) and the density of concrete varies from 450kg/m3 to 1950kg/m3 under the optimum dilution ratio of 1:40, and the compressive strength of concrete varies between 0.5-23Mpa. Compared with Eabassoc foaming agent, the addition of foaming agent makes the strength of foamed concrete for 28 days higher. According to ASTM 869-91, the chemical composition ratio can be used to prepare qualified foaming agent. After confirming the eligibility of the foaming agent, High density foam concrete (density > 1600kg/m3) was prepared by using foaming agent, metakaolin and nano-TiO _ 2. The influence of curing conditions on its compressive strength and water absorption was studied. The samples were cured at room temperature 25 鹵2oC in air and 80 鹵2oC in the oven immersed in water under 25 鹵2oC and steamed under 80 鹵2oC respectively. The content of metakaolin was 10% and 15%, respectively, and the content of nanometer titanium dioxide was 1 ~ 2 ~ 3 ~ 3 ~ 4 ~ 5 ~ 5, respectively. The effects of the curing conditions of metakaolin, nano titanium dioxide and the composite of metakaolin and nano titanium dioxide on the water absorption and compressive strength of concrete were investigated. The test results show that compared to other curing conditions such as high temperature curing, steam curing, air curing and soaking curing, the samples with only nano-TiO _ 2 (C2) and undoped nano-TiO _ 2 and metakaolin (C1) are compared. The 3D strength of C _ 1 and C _ 2 was the highest under hydrotrophic conditions. Compared with C _ 1, C _ 2 with nano TIO _ 2 only had the lowest water absorption and strength. The 28d strength of C _ 1 without nano-TiO _ 2 and metakaolin is higher than that of C _ 2. C _ 3 / C _ (4) C _ (5) with 3% nanometer TIO _ 2. Only 510% of metakaolin is mixed with C _ (2) C _ (3) C _ (3) C _ (4) C _ (5). Compared with the test results of C3C4C5 specimen, the best content of metakaolin, which has the highest strength in 28 days, is 10%, especially the sample cured in water. The water absorption increased with the increase of the content of metakaolin. Sample C _ 6C _ (7) C _ (7) C _ (8) C _ (9) C _ (9) C _ (10) was mixed with metakaolin and nanometer titanium dioxide. The experimental results show that the optimum content of 10% metakaolin and 3% nano-TiO _ 2 can make the maximum 28d strength of the sample. The strength of all the samples was the highest under the condition of water culture, followed by the strength under the condition of steaming, and the lowest under the condition of high temperature curing. The experimental results also show that the water absorption rate of the sample increases with the increase of strength. The water absorption rate of the sample under high temperature curing condition is the lowest, the water absorption rate of the sample under the condition of evapotranspiration is the second, and the water absorption rate of the sample under the condition of water conservation is the largest.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU528.2;TQ423.9
本文編號(hào)：2170311
[Abstract]:The purpose of this paper is to design a foaming agent containing organic solvents and synthetic surfactants and to study its properties in mortar. This kind of foaming agent, water reducing agent, different amount of metakaolin, nanometer titanium dioxide are used to prepare high density foam concrete (density greater than 1600kg/m3) together. At the same time, the properties of the foam concrete such as water absorption are studied under different curing conditions. Compressive strength, etc. The foaming agent is based on the synthesis of an amphiphilic organic compound containing hydrophobic and hydrophilic groups, the main purpose of which is to reduce the surface tension of water. This makes it easier to produce this foaming agent from sodium lauryl sulfate, ethanol, dodecanol and water when the high speed compressed air and foaming agent solution is mixed in a high density region, and when diluted with water and air, it produces a stable foam. Some properties of foam, such as dilution ratio, density, working capacity and drainage capacity, are studied in this paper. Foam concrete was prepared by mechanical method. The density stability, compressive strength and water absorption of concrete were studied. The results show that the initial density of foam is 104kg / m ~ (3) and the density of concrete varies from 450kg/m3 to 1950kg/m3 under the optimum dilution ratio of 1:40, and the compressive strength of concrete varies between 0.5-23Mpa. Compared with Eabassoc foaming agent, the addition of foaming agent makes the strength of foamed concrete for 28 days higher. According to ASTM 869-91, the chemical composition ratio can be used to prepare qualified foaming agent. After confirming the eligibility of the foaming agent, High density foam concrete (density > 1600kg/m3) was prepared by using foaming agent, metakaolin and nano-TiO _ 2. The influence of curing conditions on its compressive strength and water absorption was studied. The samples were cured at room temperature 25 鹵2oC in air and 80 鹵2oC in the oven immersed in water under 25 鹵2oC and steamed under 80 鹵2oC respectively. The content of metakaolin was 10% and 15%, respectively, and the content of nanometer titanium dioxide was 1 ~ 2 ~ 3 ~ 3 ~ 4 ~ 5 ~ 5, respectively. The effects of the curing conditions of metakaolin, nano titanium dioxide and the composite of metakaolin and nano titanium dioxide on the water absorption and compressive strength of concrete were investigated. The test results show that compared to other curing conditions such as high temperature curing, steam curing, air curing and soaking curing, the samples with only nano-TiO _ 2 (C2) and undoped nano-TiO _ 2 and metakaolin (C1) are compared. The 3D strength of C _ 1 and C _ 2 was the highest under hydrotrophic conditions. Compared with C _ 1, C _ 2 with nano TIO _ 2 only had the lowest water absorption and strength. The 28d strength of C _ 1 without nano-TiO _ 2 and metakaolin is higher than that of C _ 2. C _ 3 / C _ (4) C _ (5) with 3% nanometer TIO _ 2. Only 510% of metakaolin is mixed with C _ (2) C _ (3) C _ (3) C _ (4) C _ (5). Compared with the test results of C3C4C5 specimen, the best content of metakaolin, which has the highest strength in 28 days, is 10%, especially the sample cured in water. The water absorption increased with the increase of the content of metakaolin. Sample C _ 6C _ (7) C _ (7) C _ (8) C _ (9) C _ (9) C _ (10) was mixed with metakaolin and nanometer titanium dioxide. The experimental results show that the optimum content of 10% metakaolin and 3% nano-TiO _ 2 can make the maximum 28d strength of the sample. The strength of all the samples was the highest under the condition of water culture, followed by the strength under the condition of steaming, and the lowest under the condition of high temperature curing. The experimental results also show that the water absorption rate of the sample increases with the increase of strength. The water absorption rate of the sample under high temperature curing condition is the lowest, the water absorption rate of the sample under the condition of evapotranspiration is the second, and the water absorption rate of the sample under the condition of water conservation is the largest.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU528.2;TQ423.9
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 Harun TANYILDIZI;;溫度、炭纖維和硅土粉對(duì)輕量混凝土力學(xué)性能的影響(英文)[J];新型炭材料;2008年04期
，本文編號(hào)：2170311
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