CAJ | 학술논문

分别采用硅烷偶联剂KH570、聚乙烯醇和羟丙基纤维素三种表面活性剂处理超高分子量聚乙烯UPE纤维，研究了处理后纤维在水泥基中的分散性能及其砂浆的力学性能的影响。结果表明：与处理前纤维相比，经处理后的纤维，可明显提高纤维的亲水性能。一定范围内，纤维在砂浆中的分散性相对误差越小砂浆抗折强度越高，当分散误差低于7%时，抗折强度趋于稳定。与7 d龄期的素砂浆相比，较低掺量下，除硅烷偶联剂KH570能降低砂浆强度外，其余两者基本不会对砂浆强度造成影响。与处理前7 d龄期的纤维砂浆相比，经硅烷偶联剂KH570处理后的纤维砂浆的抗折、抗压强度分别降低17.1%、15.3%，弯曲韧性指数I5、I10、I30分别提高了9.7%、19.5%、14.1%；经聚乙烯醇、羟丙基纤维素处理后的纤维砂浆抗折强度分别提高7.7%、8.1%，弯曲韧性指数I5、I10、I30分别提高了8.0%、10.4%、11.6%、13.3%、13.4%、19.6%，抗压强度变化不大。
분별채용규완우련제KH570、취을희순화간병기섬유소삼충표면활성제처리초고분자량취을희UPE섬유，연구료처리후섬유재수니기중적분산성능급기사장적역학성능적영향。결과표명：여처리전섬유상비，경처리후적섬유，가명현제고섬유적친수성능。일정범위내，섬유재사장중적분산성상대오차월소사장항절강도월고，당분산오차저우7%시，항절강도추우은정。여7 d령기적소사장상비，교저참량하，제규완우련제KH570능강저사장강도외，기여량자기본불회대사장강도조성영향。여처리전7 d령기적섬유사장상비，경규완우련제KH570처리후적섬유사장적항절、항압강도분별강저17.1%、15.3%，만곡인성지수I5、I10、I30분별제고료9.7%、19.5%、14.1%；경취을희순、간병기섬유소처리후적섬유사장항절강도분별제고7.7%、8.1%，만곡인성지수I5、I10、I30분별제고료8.0%、10.4%、11.6%、13.3%、13.4%、19.6%，항압강도변화불대。
It was conducted on the different effects of coupling agent,PVA and HPMC on the performance of the UHMWPE fiber and its cement mortar.Experimental results indicated that the hydrophilic property of the modified fiber was superior to the unmodified fiber , andwithin a certain range,the fiber dispersion in the mortar was positively correlated with its flexural strength.When the dispersion error was less than 7%,the flexural strength tended to be stable.Compared to plain cement mortar at 7 ages ,PVA and HPMC basic will not af-fect the mechanical properties of mortar,while the silane coupling agent KH570 can reduce the strength of mortar.Compared to unmodified fiber mortar at 7 ages,the flexural,compressive strengths of silane coupling agent KH570 modified fiber mortar decrease by 17.1%,15.3%respectively,and the bending toughness indexes of I5,I10,I30 increase by 9.7%,19.5%,14.1% respectively.And the flexural strengths of PVA and HPMC modified fiber mortar decrease by 7.7%and 8.1%respectively ,and the bending toughness indexes of I5,I10,I30 increase by 8.0%,10.4%,11.6%and 13.3%,13.4%,19.6%respectively,while the compressive strength change is not obvious.