DESIGN AND DEVELOPMENT OF RESIN CAPSULE ANCHORING SYSTEMS FOR STRENGTHENING THE CONCRETE SURFACE USING DESIGN-EXPERT SOFTWARE

سال انتشار: 1388
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 2,256

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شناسه ملی سند علمی:

ICCD03_091

تاریخ نمایه سازی: 20 مهر 1387

چکیده مقاله:

The demand for strengthening of concrete structures has resulted in an increased use of chemical bonded anchors. Therefore, investigating the formulation and mechanical properties of adhesive grout layer has become an important issue. Different formulations of polyester resin grout were designed by Design-Expert software and their uniaxial compressive strength, volume shrinkage, gel time and maximum exotherm temperature were obtained. In addition, their rheological behaviors once the reinforcing bar is inserted were evaluated. Having optimized the above parameters by means of mixture D-optimal method, the most efficient formulation of chemical bonded anchors was developed. The effect of adding thixotropic additives and different rotational speed of anchors on the rheological behavior of optimum mixture were investigated and the resin capsule was produced. The most significant factors increasing compressive strength and volume shrinkage are resin and monomer content. Inhibitor concentration decreases both responses dramatically. Silica fume not only improves the rheological behavior of the grout, but also increases its storage time.

نویسندگان

B Kaffashi

Associate Professor, School of Chemical Engineering, University of Tehran, Tehran, I. R. Iran

M Moosavi

Associate Professor, School of Mining Engineering, University of Tehran, Tehran, I. R. Iran

I Fotovat Ahmadi

M.S Student, School of Chemical Engineering, University of Tehran, Tehran, I. R. Iran

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