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混凝土芯样端面补平技术研究与应用 被引量:2
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作者 郑靓 《工程质量》 2018年第11期79-81,共3页
钻芯法是检测混凝土抗压强度的重要方法之一,芯样的加工质量特别是端面平整度和垂直度是影响试样结果准确性的关键因素。对硫磺胶泥补平方式进行了研究,包括补平层强度和硫磺胶泥加热工艺控制等。试验结果表明采用硫磺胶泥补平,补平层... 钻芯法是检测混凝土抗压强度的重要方法之一,芯样的加工质量特别是端面平整度和垂直度是影响试样结果准确性的关键因素。对硫磺胶泥补平方式进行了研究,包括补平层强度和硫磺胶泥加热工艺控制等。试验结果表明采用硫磺胶泥补平,补平层不会先于混凝土提前破坏,保证了补平面的有效性。当硫磺胶泥在190~200℃条件下进行加热时的工作性最优,补平质量最好。此外,本研究还自主设计开发了一种新型的混凝土芯样补平器,补平效率高,补平质量好,具有较好的应用前景。 展开更多
关键词 混凝土芯样 端面补平 补平机 硫磺胶泥
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Ethical Dimensions of Payment for Forest Environmental Services 被引量:1
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作者 WU Shuirong 《Chinese Forestry Science and Technology》 2007年第1期42-56,共15页
The market-based incentive mechanism of payments for forest environmental services (PFES) seeks to capture part of the benefits derived from forest environmental services and channels them to forest resource owners/ma... The market-based incentive mechanism of payments for forest environmental services (PFES) seeks to capture part of the benefits derived from forest environmental services and channels them to forest resource owners/managers who generate these services, thus increases their incentives to conserve and manage forest resources. This paper examines some of the most important ethical issues entailed by PFES mechanism. The analysis shows that PFES may not always benefit the poor due to the comparative disadvantages of the poor and the complicated characteristics of forest ecosystem services. It is important and urgent to take ethical dimensions into account in the PFES approaches and design and develop the pro- poor payment mechanism in order to achieve the two objectives of forest conservation and economic development. 展开更多
关键词 payment for forest environmental services (PFES) ethical dimension EQUITY forest ethics
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