共查询到20条相似文献,搜索用时 187 毫秒
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水泥刨花板在我国的应用和发展前景 总被引:4,自引:0,他引:4
简要介绍了国内外水泥刨花板的发展概况,水泥刨花板的性能、应用及其生产方法,水泥刨花板的市场发展前景广阔,发展水泥刨花板符合国家的产业政策。 相似文献
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1 水泥粉煤灰刨花板简介 在水泥刨花板生产中以一定量的粉煤灰替代一定比例的水泥生产出来的板材称之为水泥粉煤灰刨花板。其不仅具有水泥刨花板的各种优良性能,而且生产中利用了粉煤灰这一工业废物,既降低了生产成本,又保护了环境,还可以获得国家的优惠政策。2二氧化碳在水泥粉媒灰刨花板生产中的应用机理 从水泥和粉煤灰的成分以及它们与水的反应情况看,水泥和粉煤灰在成品水泥粉煤灰刨花板中主要是以硅酸钙和氢氧化钙晶体形态存在.但在没有人为改变反应环境的情况下有些反应速度太慢,在经过较长时间水泥浆硬化后反应仍然存在。… 相似文献
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挤压法生产刨花板 总被引:4,自引:0,他引:4
陈学考 《林业机械与木工设备》2001,29(4):38-39
目前,国内的刨花板生产非常普遍,有普通刨花板、水泥刨花板和定向刨花板等,但现在采用挤压法生产的刨花板还没有。挤压法生产刨花板的生产工艺如下。 相似文献
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一、前言矿渣刨花板是国外近几年才出现的一种无机胶合刨花板。它是以矿渣粉末和木质刨花作原料,加上少量活性剂和水,经搅拌、成型、热压而成的一种新型刨花板。其物理力学性能与水泥刨花板相似,是一种理想的建筑材料。与水泥刨花板相比, 相似文献
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Rohny Setiawan Maail Kenji Umemura Hideo Aizawa Shuichi Kawai 《Journal of Wood Science》2012,58(1):31-37
This study examined the effects of moisture content (MC) on the manufacture of cement-bonded particleboard (CBP) using supercritical
CO2 in the curing process. Significant correlations were found between MC and the performance of CBP: the internal bond strength,
modulus of rupture, and modulus of elasticity values of CBP achieved their maximums, when the MC of boards was approximately
30%. This finding indicated that during the curing phase of manufacturing CBP, a MC of about 30%, which is nearly equal to
the water–cement (w/c) ratio of about 0.34, contributes to improved mechanical properties. However, the mechanical properties
decreased when the MC was below 30%, which had a negative effect on board performance, indicating that carbon dioxide could
not fully react and no carbonation occurred during the curing process. Maintaining a MC of approximately 30% as an ordinary
condition of the cement required in the curing of CBP could promote the reaction of carbon dioxide to form calcium carbonate
(CaCO3), which leads to increased final strength of CBP. Both X-ray diffractometry and thermal gravimetry observation agreed well
with these results and clarified that the increase of CaCO3 content caused by carbonation with increased MC of boards contributed to improving the mechanical properties of CBP. 相似文献
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Rohny Setiawan Maail Kenji Umemura Hideo Aizawa Shuichi Kawai 《Journal of Wood Science》2011,57(4):302-307
This study examined the effects of supercritical CO2 treatment on the curing and degradation of cementbonded particleboard (CBP). Significant correlations were found between
the supercritical CO2 treatment and mechanical properties during both curing and degradation processes. Internal bond (IB) strength, modulus of
rupture (MOR), and modulus of elasticity (MOE) values of CBP achieved their maximums by supercritical CO2 treatment in 30 min. These conditions indicated that supercritical CO2 treatment accelerates the curing process rapidly and enhances the mechanical properties of the CBP. However, these values
decreased in treatment from 60 min to 10 days and had a negative effect on board performance, indicating that supercritical
CO2 treatment over a longer time span leads to degradation of the CBP. Furthermore, X-ray diffractometry (XRD), thermal gravimetry
(TG-DTG), and scanning electron microscopy (SEM) observation clarified that the mechanisms of degradation are directly affected
by the mineralogical composition of the system, in par ticular, by the calcium carbonate content as caused by carbonation. 相似文献
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Dede Hermawan Toshimitsu Hata Kenji Umemura Shuichi Kawai Wakatsu Nagadomi Yasuo Kuroki 《Journal of Wood Science》2001,47(4):294-300
This study deals with the effects of curing treatment with gaseous and supercritical carbon dioxide on the properties of cement-bonded particleboard (CBP) manufactured by the conventional cold-pressing method. The hydration of cement and the mechanism of improvement were examined using X-ray diffractometry (XRD), thermal gravimetry (TG-DTG), and scanning electron microscopy (SEM) observations. The results are as follows: (1) The curing of cement was accelerated concomitantly with the improvement in mechanical and dimensional properties of CBP significantly by curing with gaseous or supercritical carbon dioxide. (2) Supercritical carbon dioxide curing imparted boards optimal properties at a faster rate than did gaseous curing. (3) Accelerated formation of calcium silicate hydrate and calcium carbonate and the interlocking of those hydration products on the wood surface are potentially the main reasons for the superior strength of carbon dioxide-cured boards. 相似文献
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在分析森林旅游产品基本内涵的基础上,充分考虑森林旅游产品的特征、发展趋势等因素,总结出森林旅游产品的开发模式,即以可持续发展为原则、以主题定位为理念、以产品创新为核心、以休闲体验为重点、以乡土开发为特色。以期对不断发展的森林旅游产品开发及经营提供建议和参考。 相似文献
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结合我国山区综合开发的现状分析,详细阐述了实施山区林业综合开发战略应坚持以林业为主体,以经济林建设为突破口,以市场为导向,以商品生产为中心的战略思想和措施。针对山区所具有的自然特征、经济特点、生产力水平、存在问题和分区布局,提出了山区林业开发建设的主要方向。 相似文献
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通过对迭部林业局腊子口森林公园生态旅游基本情况的介绍,从生态旅游可持续发展的理念出发,结合发展现状以及发展机遇,分析了腊子口地区森林生态旅游产业存在的问题,提出了加快发展其生态旅游产业的策略。 相似文献
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董本志 《林业机械与木工设备》2010,38(2):8-12
从国内软件行业的发展入手,分析了国内软件技术的发展历程和落后原因。以此为基础,介绍了国内数控相关软件发展的现状和存在的问题,得出国内木工机床软件发展受限的原因,并介绍了木工机床数控软件的工作平台和主流开发工具。 相似文献
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在参考国内自然保护区生态旅游相关文献的基础上, 结合实践现状, 概述了保护区进行生态旅游开发的理论基础、原则、方法及学术界讨论的焦点, 对保护区开展生态旅游的特殊性、未来发展趋势作出展望。 相似文献