Mechanical properties and simulation study of geopolymers grouting material
Aiming at the poor toughness of geopolymers grouting materials in fly ash base,studies the influence of two different fibers on the compressive strength and bending strength of fiber reinforced geopolymers grouting materials.In order to further reveal the stress state of the internal fibers of the grouting material,ABAQUS software was used to establish a finite element model of the fiber enhanced geopolymers grouting material,and a three-point anti-bending simulation was carried out to explore the damage pattern of the matrix and the force of the internal fibers of the matrix.The results show that,compared with polypropylene fiber,basalt fiber has better effect on bend-ing and compressive strength,when the mixing amount of basalt fiber is 0.60%,the bending and compressive strength of grouting material increases by 33.54%and 19.40%respectively.The fiber can effectively reduce the damage area of the matrix,when the mixing amount of basalt fiber and polypropylene fiber is 0.60%and 0.90%,respectively,the fiber inside the matrix can give full play to its tensile strength.
geopolymersgrouting materialsfibermechanical propertiesfinite element simulation
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