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首页> 外文会议>Global symposium on recycling, waste treatment and clean technology;REWAS 2008 >REUSE OF WASTE PAPER SLUDGE AS SUPPLEMENTARY CEMENTING MATERIAL
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REUSE OF WASTE PAPER SLUDGE AS SUPPLEMENTARY CEMENTING MATERIAL

机译：废纸渣作为辅助固井材料的再利用

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This paper shows the possibility of reutilize paper sludge waste as supplementary cementing material for the cement manufacture. This industrial waste consists essentially of a mixture of organic matter (30%) and inorganic compound, such as calcite and clay minerals. The raw paper sludge does not present pozzolanic properties, but once calcined at 650°C during 2 hours, exhibits high pozzolanic activity, similar to silica fume at 28 days, as a consequence of the transformation of kaolinite into metakaolinite. Calcined paper sludge was used as partial Portland cement replacements of 0, 5, 10 and 20%. Enhancement in compressive strength was appreciably obtained for 10 and 20% substitution levels from 7 days on. Furthermore, calcined paper sludge slightly reduces the initial and final setting times of cement paste.
机译：本文显示了将纸浆污泥再利用为水泥生产的辅助胶结材料的可能性。这种工业废料主要由有机物质（30％）和无机化合物（如方解石和粘土矿物）的混合物组成。原纸污泥不具有火山灰性质，但一旦在650°C下煅烧2小时，由于高岭石向偏高岭石的转化，其高火山灰活性（类似于28天的硅粉）表现出。煅烧的纸浆污泥被用作0、5、10和20％的部分波特兰水泥替代品。从7天开始，对于10％和20％的取代水平，抗压强度明显提高。此外，煅烧后的纸浆污泥会稍微减少水泥浆的初始和最终凝固时间。

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