NDLI: The application of waterworks sludge ash to stabilize the volume of cement paste.

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The application of waterworks sludge ash to stabilize the volume of cement paste.

Content Provider	Semantic Scholar
Author	Luo, Huan-lin Kuo, Wei Ti Lin, Dong Fei
Copyright Year	2007
Abstract	In order to extend the recycling of waterworks sludge to engineering applications, this paper addresses the influence of nano-SiO2 on incinerated waterworks sludge ash (IWSA) cement paste attacked by sulfate. Tests were performed such as length measurement for volume change, compressive strength, weight loss, and micro-structural testing using scanning electron microscopy (SEM). The results indicate that when a portion of the cement in the paste was replaced by IWSA, the IWSA diluted the cementitious material C3A, and filled the capillary pores in the hardened paste. Moreover, since IWSA has potential pozzolanic activity, it can chemically react with Ca(OH)2 crystals in the paste and can consequently improve the resistance of the paste to sulfate attack. Test results also show that due to the fully developed pozzolanic effect of IWSA, the major reaction products of sulfate attack, gypsum and ettringite, were clearly reduced. Hence, the expansion rate in length decreased with the increase of IWSA replacement. Furthermore, the addition of nano-SiO2 to IWSA cement paste can also reduce the length expansion rate.
Starting Page	251
Ending Page	263
Page Count	13
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.bvsde.paho.org/bvsaar/cdlodos/pdf/theapplication487.pdf?origin=publicationDetail
PubMed reference number	18235178v1
Alternate Webpage(s)	https://doi.org/10.2166/wst.2008.015
DOI	10.2166/wst.2008.015
Journal	Water science and technology : a journal of the International Association on Water Pollution Research
Volume Number	57
Issue Number	2
Language	English
Access Restriction	Open
Subject Keyword	Addresses (publication format) Ash tree Calcarea sulphurica, gypsum, sulphate of calcium, Homeopathic preparation Compressive Strength Fill Magnesium Sulfate Material Pore Size Paste substance Physical Phenomenon or Property Recycling Scanning Electron Microscopy Specimen Sulfates, Inorganic Surgical Replantation bioactive SrO-SiO2 glass ettringite
Content Type	Text
Resource Type	Article

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