土木建筑与环境工程
土木建築與環境工程
토목건축여배경공정
JOURNAL OF CIVIL, ARCHITECTURAL & ENVIRONMENTAL ENGINEERING
2014年
1期
130-137
,共8页
纳米高岭土%水泥基材料%工作性%强度%渗透性%SEM%氯离子%RCM
納米高嶺土%水泥基材料%工作性%彊度%滲透性%SEM%氯離子%RCM
납미고령토%수니기재료%공작성%강도%삼투성%SEM%록리자%RCM
kaolinite clay%cement-based material%workability%strength%permeability%SEM%chloride%RCM
研究了纳米高岭土颗粒对不同龄期水泥基材料微观结构（微孔结构、微观结构）及物理力学性能（工作性、抗弯强度、抗压强度、氯离子渗透性）的影响。结果表明，纳米高岭土颗粒的填充效应及其对水泥水化的促进作用改善了水泥基材料的微观孔结构，限制了氯离子在水泥基材料中的渗透扩散。当高岭土为水泥质量的1％时，水泥浆1、3、7、90 d抗弯强度分别提高30．41％、39．04％、36．27％和38．32％；当高岭土为水泥质量的5％时，水泥砂浆氯离子扩散系数降低53．03％；混凝土氯离子扩散系数随高岭土掺量增加呈指数递减；当高岭土为水泥质量的5％时，氯离子扩散系数降低18．87％；抗压强度分别提高28．4％；改性混凝土28 d抗压强度与混凝土氯离子扩散系数呈线性增加关系。
研究瞭納米高嶺土顆粒對不同齡期水泥基材料微觀結構（微孔結構、微觀結構）及物理力學性能（工作性、抗彎彊度、抗壓彊度、氯離子滲透性）的影響。結果錶明，納米高嶺土顆粒的填充效應及其對水泥水化的促進作用改善瞭水泥基材料的微觀孔結構，限製瞭氯離子在水泥基材料中的滲透擴散。噹高嶺土為水泥質量的1％時，水泥漿1、3、7、90 d抗彎彊度分彆提高30．41％、39．04％、36．27％和38．32％；噹高嶺土為水泥質量的5％時，水泥砂漿氯離子擴散繫數降低53．03％；混凝土氯離子擴散繫數隨高嶺土摻量增加呈指數遞減；噹高嶺土為水泥質量的5％時，氯離子擴散繫數降低18．87％；抗壓彊度分彆提高28．4％；改性混凝土28 d抗壓彊度與混凝土氯離子擴散繫數呈線性增加關繫。
연구료납미고령토과립대불동령기수니기재료미관결구（미공결구、미관결구）급물리역학성능（공작성、항만강도、항압강도、록리자삼투성）적영향。결과표명，납미고령토과립적전충효응급기대수니수화적촉진작용개선료수니기재료적미관공결구，한제료록리자재수니기재료중적삼투확산。당고령토위수니질량적1％시，수니장1、3、7、90 d항만강도분별제고30．41％、39．04％、36．27％화38．32％；당고령토위수니질량적5％시，수니사장록리자확산계수강저53．03％；혼응토록리자확산계수수고령토참량증가정지수체감；당고령토위수니질량적5％시，록리자확산계수강저18．87％；항압강도분별제고28．4％；개성혼응토28 d항압강도여혼응토록리자확산계수정선성증가관계。
T he effects of kaolinite clay on the microstructure (pore structure , internal structure ) and mechanical properties (workability ,early-age and long-term flexural strength ,chloride diffusion property ) of the cementitious composites were tested .It is shown that the addition of clay improves the micro-pore structure in the cement paste and limits the introduction of chloride ions .As a result ,it is suggested that the kaolinite clay would act as both filler and accelerator of cement hydration .Compared with the control specimen ,the flexural strength of cement paste with 1% kaolinite clay increased by 30 .41% ,39 .04% , 36.27% and 38 .32% at 1 ,3 ,7 and 90 curing ages ,respectively .The 28-day flexural strength increased slightly .It is observed that the clay modified cement mortar has lower chloride diffusion coefficient values compared to the plain mortar ,and the 28-day DCl of cement mortar decreased by 53 .03% with 5% clay . Compared with the controlled sample ,the increase in compressive strength and the reduction in chloride diffusion coefficient of the concrete with 5% clay addition is 28 .4% and 18 .87% respectively .The chloride diffusion coefficient of concrete decreases with the amount of clay addition exponentially . The 28-day compressive strength increases linearly with the chloride diffusion coefficient of the concrete .
