共查询到19条相似文献,搜索用时 93 毫秒
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棉杆刨花板生产工艺的研究 总被引:2,自引:0,他引:2
利用农作物废料棉秆制造棉杆刨花板的关键是采用正确的生产工艺,才能制定出符合国家刨花板标准的棉秆刨花板.而刨花的制备和热压工艺是棉秆刨花板生产中重要的工序。 相似文献
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《Planning》2016,(13)
为研究棉秆纤维对陶粒泡沫混凝土抗剪强度的影响,采用双面剪切法进行抗剪性能试验,对比相同纤维掺量及纤维长度下,棉秆纤维、玻璃纤维和聚丙烯纤维对陶粒泡沫混凝土抗剪强度的增强效果,分析棉秆纤维掺入量和纤维长度两个因素在不同水平下对陶粒泡沫混凝土抗剪强度的影响。结果表明:在0.2%纤维掺量及6~10mm纤维长度下,3种纤维中玻璃纤维对陶粒泡沫混凝土抗剪强度的增强效果最大,聚丙烯纤维次之,棉秆纤维最小,但掺加棉秆纤维亦能有效提高陶粒泡沫混凝土抗剪强度;相同棉秆纤维长度但不同纤维掺量下,0.8%掺量组的试块抗剪强度最高,其抗剪强度较同配比未掺纤维的试块提高39.2%;相同棉秆纤维掺量但不同棉秆纤维长度下,11~15mm长度的棉秆纤维能进一步增强陶粒泡沫混凝土的抗剪强度。棉秆纤维增强型陶粒泡沫混凝土的剪压比较高,抗剪性能好。 相似文献
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竹纤维水泥刨花板生产方法该发明是一项利用竹材取代木质材料生产水泥刨花板的方法。以前,水泥刨花板通常是利用木屑、刨花、木片、木纤维等作为木质材料,与各种水泥和水混合,成型、养护固化而成。虽也曾用过竹材,但由于它的弹性大,成型性差,成型后易产生回弹,不能... 相似文献
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一、原料范围不断扩大从使用原料上看刨花板工业经历了利用工厂刨花与碎料、小径材与枝丫材、采伐剩余物与间伐剩余物以及目前一些发达国家正在实施的刨花板人工林等四个阶段。特别是这几年随着各国对环境保护问题的重视,许多发达国家如美国等还已开始注意利用废旧木材制造刨花板,也相应诞生了木材再用技术(Wood Reuse Technology)。 相似文献
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针对目前国内外在利用棉杆制造复合板中存在的原材料处理不当,前段工序设备不合理出现的失火、铺装成型困难、板材质量差、原材料利用率低等问题,提出切实可行的改进方法。 相似文献
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A new environment-friendly thermal insulation material—binderless cotton stalk fiberboard (BCSF) made from cotton stalk fibers with no chemical additives was developed using high frequency hot-pressing. The goal of this paper was to investigate the effect of board density, fiber moisture content (MC) and pressing time on thermal conductivity and mechanical properties of BCSF. The results showed that the board with a density of 150-450 kg/m3 had the thermal conductivity values ranging from 0.0585 to 0.0815 W/m K, which was close to that of the expanded perlite and vermiculite within the same density range. The thermal conductivity values had a strong linear correlation with the board density. The internal bonding strength (IBS) of boards was good at the relatively low-density level, which can be significantly improved with increasing the fiber MC and prolonging pressing time. The same trend was observed for modulus of rapture (MOR) and modulus of elasticity (MOE) of the boards. As an environment-friendly and renewable material, the BCSF is particularly suitable for ceiling and wall applications to save energy. 相似文献
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针对路面地基换填土层,设计掺棉杆纤维轻量土作为换填材料,开展离心吸力试验与冻融循环试验,研究了轻量土持水特性与抗冻特性。探讨了棉杆纤维轻量土持水特性受水泥含量、棉杆纤维含量的影响规律,全过程含水量随吸力呈"不变-快降"变化,吸力10 kPa为含水量变化拐点;对比得知轻量土与黄土在吸力40 kPa临界点前,黄土含水量高于轻量土,临界点后则相反。研究发现轻量土密度、强度和冻融循环次数呈递减至稳定变化;高冻融循次数下参数稳定,循环次数在前10次时,抗压强度降低幅度为34.2%,之后强度稳定在63.5 kPa。该研究成果可为棉杆纤维轻量土在路面地基中设计应用提供一定参考。 相似文献
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Wenyuan Ren Tao Yang Miansong Huang Aijun Zhang Hanlin Wei Wenjing Mi Yuguo Wang Jinfang Hu 《Soils and Foundations》2021,61(2):453-464
The application of lightweight soil for changing and filling is an effective foundation treatment method for the construction of sponge cities in collapsible loess areas. In this paper, the L25(54) orthogonal test targeting on the strength, permeability and density characteristics was first used to optimize the mixture ratio design of proposed lightweight soil with cotton stalk fibres (LSCF). The corresponding effects of each mixed content on the performance of LSCF were analysed. The soil water characteristic curves (SWCCs) of LSCF with different cement and cotton stalk fibre contents were then measured using the quick centrifuge method. In comparison with undisturbed loess, the volumetric moisture content of LSCF (for the same matrix suction) was larger, and LSCF had a better water-holding capacity. Based on the Van Genuchten model, an improved fitting model for matrix suction SWCC of LSCF was proposed by considering the influence of cement. Qualitative agreement with the test results indicates that the proposed model could be potentially used to obtain the SWCC curve without conducting any experiments, which is especially useful for the sponge city constructions in loess areas. 相似文献
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以棉秸秆纤维作为沥青混合料的增强材料,研究棉秸秆纤维制备过程中的关键因素对其增强性能的影响。通过控制棉秸秆纤维制备时的浸泡程度、喂料前的含水量和粉碎室内的打散时间三个关键工艺参数,根据棉秸秆纤维的吸油性、耐热性、吸湿性、棉秸秆纤维掺入沥青胶浆的延伸度等评价,确定最佳的制备工艺流程。 相似文献
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利用资源丰富和廉价易得的棉花秸秆制取性价比高的夹心墙板,消除了一个空气污染源,得到了一种用途广泛的新型建筑材料。为保证棉秸秆夹心保温隔墙条板产品的质量,满足GB/T 23451—2009《建筑用轻质隔墙条板》的标准要求,根据原材料的特点从面层和夹心层两方面对原材料的选择、生产过程、生产方法、设备的选择等进行了有效的试验探索研究,从理论角度对该产品的生产可行性予以分析、论证。 相似文献
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采用磷酸镁水泥(MPC)、粉煤灰和油菜茎秆制备新型绿色混凝土,探讨了该混凝土作为保温隔热墙体材料的可行性,并讨论了油菜茎秆的掺量和尺寸对混凝土性能的影响,测试了所制备的植物茎秆增强混凝土的表观密度、抗压强度和导热系数.结果表明:所制备的植物茎秆增强混凝土可以满足承重和非承重墙体材料的技术要求;油菜茎秆的多孔隙特征保证了该绿色混凝土具有优异的保温隔热特性;与硅酸盐水泥和石灰等其他胶凝材料相比,磷酸镁水泥更适宜制备植物茎秆增强混凝土. 相似文献