混凝土
混凝土
혼응토
CONCRETE
2014年
6期
88-91
,共4页
超低密度%泡沫混凝土%化学发泡%憎水剂
超低密度%泡沫混凝土%化學髮泡%憎水劑
초저밀도%포말혼응토%화학발포%증수제
super low density%foamed concrete%chemically foaming%waterproofing agent
较高的吸水率是超低密度泡沫混凝土的一个显著的性能弱点也是影响其工程使用和长期耐久的一个重要问题。通过吸水率和物理性能试验在试验室考察了3种憎水剂的添加对干燥密度为150~250 kg/m3的超低密度泡沫混凝土耐水性改善的效果及其对物理性能的影响。试验结果表明：憎水剂的种类和掺量对泡沫混凝土的吸水率有影响显著，其中，改性硬脂酸盐憎水剂憎水效果最好，有机硅憎水剂憎水效果最差；不同的憎水剂对其强度也有一定的影响，但是，影响程度不大。
較高的吸水率是超低密度泡沫混凝土的一箇顯著的性能弱點也是影響其工程使用和長期耐久的一箇重要問題。通過吸水率和物理性能試驗在試驗室攷察瞭3種憎水劑的添加對榦燥密度為150~250 kg/m3的超低密度泡沫混凝土耐水性改善的效果及其對物理性能的影響。試驗結果錶明：憎水劑的種類和摻量對泡沫混凝土的吸水率有影響顯著，其中，改性硬脂痠鹽憎水劑憎水效果最好，有機硅憎水劑憎水效果最差；不同的憎水劑對其彊度也有一定的影響，但是，影響程度不大。
교고적흡수솔시초저밀도포말혼응토적일개현저적성능약점야시영향기공정사용화장기내구적일개중요문제。통과흡수솔화물이성능시험재시험실고찰료3충증수제적첨가대간조밀도위150~250 kg/m3적초저밀도포말혼응토내수성개선적효과급기대물이성능적영향。시험결과표명：증수제적충류화참량대포말혼응토적흡수솔유영향현저，기중，개성경지산염증수제증수효과최호，유궤규증수제증수효과최차；불동적증수제대기강도야유일정적영향，단시，영향정도불대。
Higher water absorption is believed to be an obvious property weakness of the super low density foamed concrete which also becomes a big problem influences its engineering application and long term durability.Effect of the addition of 3 kinds of waterproofing a-gents on the physical properties and water resistance of the super low density foamed concrete with dry density 150 to 200 kg/m 3 was there-fore examined by means of determination of water absorption and physical tests here.Results showed that addition of the waterproofing a-gents significantly influenced the water absorption of the foamed concrete,among which the modified stearate presented the best water-proofing effectiveness while the organic silica being the worst.In addition ,different kind of waterproofing agent also influences the strength of the foamed concrete although only in a very limited extent.
