偏高岭土成分对硫酸盐和硫酸盐-氯化物侵蚀下钢纤维混凝土浆料中钢纤维与水泥粘结性的实验研究

IF 5.3 2区 地球科学 Q2 CHEMISTRY, PHYSICAL
Mohammadhosain Rezaei , Ali Delnavaz , Mohammad Delnavaz
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引用次数: 0

摘要

本研究旨在利用钢纤维/高岭土(SFs/MK)复合混凝土制作试件,使其在侵蚀性介质(即硫酸钠和氯化钠)条件下具有优异的强度特性和受控的开裂行为。SF 与混凝土的复合材料充满孔隙,会在试样中产生薄弱区。因此,需要使用粘土材料来减少孔隙率。在这种情况下,粘土的一般物理和化学特性,包括结构以及氧化铝和石英的比例,对形成具有适当机械特性的复合材料起着重要作用。研究了 SF 重量的变化、老化期对强度的影响以及侵蚀性溶液的影响,并与 SF 钢筋混凝土进行了比较。二氧化氮吸附-解吸、场发射扫描电子显微镜(FE-SEM)、X 射线粉末衍射(XRD)、X 射线荧光(XRF)和抗压强度测试的结果表明,具有无序堆叠、氧化铝比例较高和石英含量较低的 MK 在混凝土复合材料中具有更好的粘结性。根据本研究进行的实验,15.0% 的 MK 和 2.0% 的 SF 取代水泥后,由于孔隙率和吸水率值的增加,抗硫酸盐和氯化物的能力分别得到了提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental investigation of metakaolin ingredients on bonding of steel fibers to cement in paste of steel fiber concrete under sulfate and sulfate–chloride attack

The present study aimed to produce specimens made from steel fibers/metakaolin (SFs/MK) composite concrete that would achieve superior strength characteristics and controlled cracking behavior under aggressive media (i.e. sodium sulfate and sodium chloride). The composite of SF and concrete is full of porosity, creating weak zone in the specimens. Therefore, the use of clay materials is required to reduce the porosity. In this context, the general physical and chemical properties of clay, including structure and the percentage of alumina and quartz, play a significant role in forming composites with suitable mechanical properties. The changes in weight of SFs, effects of the aging period in terms of strength, and effect of aggressive solution are investigated and compared with SF reinforced concrete. The findings from N2 adsorption-desorption, field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD), X-ray fluorescence (XRF) and compressive strength tests indicate that MK with disordered stacking and higher percentage of alumina, and lower quartz content provides better bonding in the concrete composite. According to the experiments conducted in this study, a 15.0 % MK and 2.0 % SF replacement of cement increased the sulfate and chloride resistance due to porosity, and water absorption values, respectively.

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来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
期刊介绍: Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...
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