Research on a New Type of Building Sealant Made from Bentonite
Bentonite is an excellent sealant mineral material because of its desirable swelling and self-healing characteristics,low permeability,sorptive qualities,and longevity in nature.A new type of water-swelling building sealant made from bentonite was studied in this paper.The building sealant is prepared by Na-base bentonite,vaseline and paraffin wax under different mass fraction of bentonite (which is 60%,65%,70% respectively).Under unrestricted state,some properties of samples were investigated.The volume expansion ratio at 24 h is 211%,222%,256%,and permeability coefficient is 2.86×10-8 cm/s,4.15×10-8 cm/s and 4.78×10-8 cm/s respectively;low temperature flexibility of the sample (bentonite quality is 65%,70% respectively) is good,and it does not flow heated for 2 h under 80℃.The results of XRD and SEM indicate that bentonite is coated preferably by vaseline,and the spacing of layers of bentonite do not changed.The sample can keep full water swelling ability,and has good molding process.The test results prove that the properties of samples may reach the standard of building sealant.
Bentonite Water swelling Building sealant Unrestricted state Permeability coefficient
X.G.Liu Y.X.Niu E.D.Wang H.Shao
School of Resources & Civil Engineering,Northeastern University,Shenyang,China School of Chemical En School of Resources & Civil Engineering,Northeastern University,Shenyang,China School of Chemical Engineering,Shenyang Institute of Chemical Technology,Shenyang,China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3445-3449
2008-09-24(万方平台首次上网日期,不代表论文的发表时间)