Dissertation
Dissertation > Industrial Technology > Building Science > Building Materials > Non-metallic materials > Concrete and concrete products

Study on Performance of Alkali-activated Flyash-based Geopolymer Reinforced by Organic Resin

Author WangYaChao
Tutor ZhangYaoJun
School Xi'an University of Architecture and Technology
Course Materials Science
Keywords Alkali Activated Fly ash Toughening Organic resin Silica fume
CLC TU528
Type Master's thesis
Year 2011
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The review of the system in this article alkali activated fly ash base polymer and its strengthening and toughening of the status quo . Three organic resin emulsion for alkali activated fly ash geopolymer strength low defect with respect to their strengthening toughening were synthesized the organic the resin toughened alkali inspire fly ash - silica fume base polymer composite . Means the composites were characterized by XRD, XRF, SEM, TGA-DSC , etc. . Mixed with silica fume replace some of the fly ash can improve alkali activated fly ash base the mechanical properties of the polymer , three organic resin emulsion , flexible latex ( TC -200 ) , styrene-acrylic emulsion (BC-982) , and acrylic emulsion (BN-10), alkali activated fly ash - silica fume base polymer cementitious materials are strengthening toughening effect , the incorporation of 1wt% BC-982 composite materials at room temperature conservation 28d , and not doped (zero dosage , 0 wt %) geopolymer compared to the compressive strength increased by 62% , the flexural strength increased by 115% . XRD results show that : the conservation instars alkali activated fly ash - silica fume base polymer material at room temperature phase composition remains amorphous mineral phase , quartz and mullite crystalline phase ; incorporation of organic resin the lotion not changed alkali activated fly ash - silica fume base polymer mineral phase composition . The organic resin toughening of alkali activation of fly ash - silica fume base polymer cementitious materials after 25 ° C , 130 ℃ , 250 ℃ , 500 ℃ and 850 ℃ for 1h , the XRD patterns did not change significantly , remains amorphous material ; SEM results show that : play the effect of interstitial alkali activated cementitious materials in the fly ash base polymer mixed with silica fume and organic resin emulsion ; TG-DSC results show that : incorporation organic resin emulsion shows water , alkali activated fly ash - silica fume base polymer moisture evaporation loss can be suppressed to a certain extent ; Griffith theoretical analysis shows that : the incorporation of organic resin emulsion may change the alkali activation of fly ash - the silica fume polymer matrix interface , thus achieving enhanced toughening effect .

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