Enhancement of cementing properties of fly ash-Portland cement blend with chemical activators and quality improvers

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 645

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شناسه ملی سند علمی:

ICHEC07_763

تاریخ نمایه سازی: 25 فروردین 1394

چکیده مقاله:

This study has investigated the activation of fly ash and Portland cement mixture with a compound additive using different chemical activators and quality improvers. The compound additive is mainly composed of a sulfate-containing compound, e.g. gypsum and anhydrite, with little amountof suitable calcium aluminate. A number of different chemical activators of different groupsincluding chlorides, sulphates, nitrates, and phosphates with two different quality improversincluding Triethanolamine and Triisopropanolamine were used individually. The obtained experimental results confirm the effectiveness of activators and quality improvers on enhancement of the cementing properties of fly ash-Portland cement binary blends. Paste specimens fromoptimum proportion including 55 wt% fly ash, 40 wt% Portland cement, and 5 wt% compound additive chemically activated with suitable soluble salts exhibit 28- and 60-day compressive strengths up to almost 65.0 and 98.5 MPa. Also 28- and 60 day compressive strength of optimumproportion with 0.08 wt% of TEA increases to 70 and 90 MPa, respectively. Also attempts were made to characterize the binding compound of the material using the laboratory techniques of xray diffractometry

نویسندگان

Ali Allahverdi

Cement Research Center, School of Chemical Engineering,Iran University of Science and Technology, Narmak ۱۶۸۴۶-۱۳۱۱۴,Tehran, Iran

Mir Mohammad Seyedi

Cement Research Center, School of Chemical Engineering,Iran University of Science and Technology, Narmak ۱۶۸۴۶-۱۳۱۱۴,Tehran, Iran

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