Manufacturing Process and Properties of Alkaline Activated Binders Made from Rice Husk Ash

  • 阮 黃明

Student thesis: Doctoral Thesis

Abstract

Annular huge amount of waste rice husk becomes a severe ecology and environment problem that the Vietnam government has to deal with Rice husk is the byproduct of agricultural paddy milling Normally it takes a long time for waste rice husk to decompose at ambient temperature People in some regions of southern Vietnam have trouble of lots of waste rice husk dumped arbitrarily in agricultural fields The amount of waste rice husk is significantly increased after harvesting of crops limiting the space available to living animals and human beings Meanwhile the emission of large amount of carbon dioxide in cement industry could lead to the greenhouse effect on earth When both ecology and environment problems are taken into account the feasibility for the replacement of Portland cement by using rice husk in the production of Portland cement binders needs to be investigated in detail Because high proportion of silica is contained in waste rice husk it can be used as a raw material in the production of alkaline activated binders By conducting a series of tests the most suitable burning temperature for making rice husk ash and the appropriate alkaline activator for producing alkaline activated binders were experimentally obtained It is found that the burning temperature of 700oC is preferred to make the alkaline activated binder with the highest compressive strength when 100g rice husk is placed inside a sintering furnace with a volume of 0 174 m3 Besides the most appropriate alkaline activator is AE%= 3 5% Ms=0 8 and W/C=0 2 while the adequate mixing time is 5 minutes
Date of Award2019
Original languageEnglish
SupervisorJong-Shin Huang (Supervisor)

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