Study on Performance of Alkali-activated Flyash-based Geopolymer Reinforced by Organic Resin
|School||Xi'an University of Architecture and Technology|
|Keywords||Alkali Activated Fly ash Toughening Organic resin Silica fume|
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 .