共查询到17条相似文献,搜索用时 93 毫秒
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利用钢渣研制复合硅酸盐水泥的正交试验研究 总被引:1,自引:0,他引:1
通过正交试验进行了利用钢渣配制复合硅酸盐水泥的初步研究。研究结果表明,将钢渣单独粉磨后与矿渣微粉复合掺入硅酸盐水泥,再适当地辅以掺加石膏和激发剂,可获得性能良好的具有较高强度的复合硅酸盐水泥。 相似文献
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研究了不同品种熟料及细度,粉煤灰、矿渣粉及钢渣粉对复合水泥最早期强度的影响.研究表明:随熟料细度提高,水泥24h内最早期强度有明显提高.在化学组成及含量接近的情况下,熟料品种对水泥最早期强度影响不明 显.掺加粉煤灰、矿渣粉和钢渣粉等矿物掺合料后,复合水泥浆体最早期强度均有明显降低,但12h后复合水泥与纯硅酸盐水泥... 相似文献
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钢渣-矿渣复掺作水泥混合材的试验研究 总被引:1,自引:0,他引:1
将钢渣粉与矿渣粉以1∶2比例复掺后以30%、50%和80%的掺量用于水泥中,并加入活性激发剂,所配制水泥的各种性能指标满足GB175-2007《通用硅酸盐水泥》的技术要求。分析认为,钢渣粉与矿渣粉复掺提高了颗粒级配的连续性;加入激发剂可以有效促进钢渣的水化,而钢渣的水化又能促进矿渣的水化,提高了钢渣-矿渣复掺粉的活性。钢渣-矿渣复掺粉可以作为混合材大量应用于水泥生产中。 相似文献
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文章作者选用三种抗硫酸盐性能较好的#525铁铝酸盐水泥、#525抗硫酸盐水泥和#525中热硅酸盐水泥,加入粉煤灰或硅粉混合材料后,分别进行抗硫酸盐侵蚀性能的试验研究,研究结果表明,铁铝酸盐水泥本身抗硫酸性能良好,加入混合材料后,其抗硫酸盐性能无明显改善;而其他两种硅酸盐类水泥,加入硅粉或粉煤灰混合材料后,其抗酸盐性能均有改善作用。 相似文献
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In Part 1 of this paper, it was shown that enhanced hydration was achieved by blending a fine non-hydraulic filler into an ordinary Portland cement. This enhancement was considered to be a particle size effect and associated with the presence of fine particles of filler which provided the additional nucleation sites. The filler, rutile, had a variable cement equivalence and reached a maximum value of 0.9kg/kg after hydration had proceeded for three days. In this second part, the same Portland cement was blended seperately with latent hydraulic binders (two pulverized fuel ashes and a ground granulated blastfurnace slag, a Lurgi slag and a volatilized silica). The apparent overall reactivity of these binders was seen to have two components, the first being the particle size effect with its influence on the hydration of the Portland cement and the second the inherent hydraulicity of the secondary material. 相似文献
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The insufficient early strengths of cement mortars in which partial cement had been replaced by pulverized slag melted from municipal solid waste incinerator (MSWI) fly-ash were tackled in this study by adjusting the basicity of the slag through the addition of various amounts of CaCO3 into MSWI fly-ash, melted into a ‘modified slag’, pulverized to partially replace cement. Increased basicity in the modified slag manifestly improves the early compressive strengths of cement mortar with 20% Portland cement replaced by the modified slag powder (20 wt.% CaCO3 added). The 14-day and 28-day compressive strengths of the mortars evidently increased to nearly that of the reference specimen made of only Portland cement mortar. The 90-day compressive strength is even higher than that of the reference specimen. Porosity and Fourier transform infrared spectra (FTIR) analyses evidenced the improvement in early strengths by hydration while the enhancement in long-term strength by pozzolanic reaction in the CaCO3 added slag-cement mortar. 相似文献
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研究了钢渣对水泥强度及体积膨胀率的影响,采用SEM和EDXA分析了水化产物的形貌和微区化学成分,并用XRD对水化产物的矿物组成进行了分析研究。研究结果表明,钢渣的掺入会降低水泥净浆的早期抗压强度,但随钢渣水化的进行,掺钢渣的水泥浆体7d以后的强度增长较快,至120d时净浆抗压强度已与纯硅酸盐水泥相近。掺钢渣的水泥的体积膨胀率比纯硅酸盐水泥的体积膨胀率大,钢渣水泥的体积膨胀率主要取决于钢渣中的fCaO含量。掺钢渣水泥的主要水化产物组成和形貌与纯硅酸盐水泥无明显差别,所不同的是C-S-H凝胶中有较多的铁相。掺钢渣水泥的水化产物主要有C2SH(C)、AFt和Ca(OH)2。 相似文献