|Table of Contents|

Experimental study and model prediction on performance of aggregate-reinforced fly ash foamed concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年04期
Page:
33-40
Research Field:
建筑材料
Publishing date:

Info

Title:
Experimental study and model prediction on performance of aggregate-reinforced fly ash foamed concrete
Author(s):
HUO Junfang1; 2;  CI Tianyi1;  HAO Yunhong1; 2; 3;  SUN Hao1;  WU Zhuoxuan1;  CHA Kelehan1
(1. School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China; 2. Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China; 3. Inner Mongolia Autonomous Region Engineering Research Center of Structure Inspection, Appraisal and Safety Assessment, Inner Mongolia University of Technology, Hohhot 010051, Inner Mongolia, China)
Keywords:
fly ash;  foamed concrete;  cubic compressive strength;  pore size distribution;  grey theory
PACS:
TU528.2
DOI:
10.19815/j.jace.2021.11072
Abstract:
The effects of water binder ratio, sand binder ratio, fly ash content, quartz sand and quartz powder mass ratio on cubic compressive strength and splitting tensile strength of aggregate-reinforced fly ash foamed concrete were studied. The pore structure and micro morphology of aggregate-reinforced fly ash foamed concrete with different sand binder ratios were tested. The influences of four factors on the strength of aggregate-reinforced fly ash foamed concrete were analyzed through gray theory, the strength of aggregate-reinforced fly ash foamed concrete was predicted, and the error of the prediction results was analyzed. The results show that when the water binder ratio is 0.4, sand binder ratio is 0.8, the content of fly ash is 25%, and the mass ratio of quartz powder to quartz sand is 1:1, the cubic compressive strength and splitting tensile strength of the test piece are better. The pore size distribution of aggregate-reinforced fly ash foamed concrete with different sand binder ratios ranges from 0.1 to 10 μm. The pore size distribution range of the specimen with a sand cement ratio of 0.8 is good, with a dense microstructure and good microstructure. The influence degree of four factors on cube compressive strength of aggregate-reinforced fly ash foamed concrete from large to small is sand binder ratio, quartz powder and quartz sand ratio, water binder ratio and fly ash content. The traditional grey theory model and MGM grey theory model have good effects on predicting the cubic compressive strength and splitting tensile strength, and the model accuracy reaches the second level. The test results and prediction model can provide reference for the research and application of aggregate-reinforced fly ash foamed concrete.

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Last Update: 2023-07-01