CAJ | 학술논문

已有研究表明与普通水泥砂浆相比,采用相同水灰比的聚氨酯水泥砂浆可以获得较好的耐久性.本文把聚氨酯作为混凝土改性材料,经初步研究发现,掺入聚氨酯的混凝土坍落度损失增大,向混凝土中加入聚羧酸减水剂解决了这一问题.本文通过试验以抗压强度为指标初步优化了聚氨酯改性混凝土的养护条件和加料顺序.此外,加入到混凝土中的匀泡剂由于对聚氨酯有极优异的乳化能力,有可能形成了极细的泡孔和狭窄的孔径分布以及极高的闭孔率,可以提高聚氨酯混凝土的耐久性.本文选择了不同厂家提供的甲、乙两种匀泡剂并进行强度试验,以抗压强度为指标选择强度较高一种的应用于聚氨酯改性混凝土.
이유연구표명여보통수니사장상비,채용상동수회비적취안지수니사장가이획득교호적내구성.본문파취안지작위혼응토개성재료,경초보연구발현,참입취안지적혼응토담락도손실증대,향혼응토중가입취최산감수제해결료저일문제.본문통과시험이항압강도위지표초보우화료취안지개성혼응토적양호조건화가료순서.차외,가입도혼응토중적균포제유우대취안지유겁우이적유화능력,유가능형성료겁세적포공화협착적공경분포이급겁고적폐공솔,가이제고취안지혼응토적내구성.본문선택료불동엄가제공적갑、을량충균포제병진행강도시험,이항압강도위지표선택강도교고일충적응용우취안지개성혼응토.
It has been proved that the mortar added with polyurethane can acquire better durability when comparing with the normal mortar which has the same water to cement ratio. In this paper,polyurethane was put into concrete as concrete modified material,but pilot study showed that polyurethane could increase the loss of slump. Finally this problem was solved by adding polycarboxylate superplasticizer into the concrete. And also, this paper used compressive strength as an important parameter to decide the optimal curing condition and optimal sequence of materials-adding. Furthermore,because of the excellent emulsification of foam stabilizer to polyurethane and the sequent ability of forming tinier air bubble and limited pore size distribution as well as higher close porosity, the foam stabilizer can be used in polyurethane concrete to improve the durability. In this paper, two kinds of foam stabilizer from different manufacturers are put into experiment, and according to its compressive strength effect the better one is selected and then applied to polyurethane modified concrete.