|Table of Contents|

Statistical Analysis of Compressive Strength of Shale Hollow Bricks(PDF)

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

Issue:
2019年06期
Page:
18-25
Research Field:
Publishing date:

Info

Title:
Statistical Analysis of Compressive Strength of Shale Hollow Bricks
Author(s):
LI Bi-xiong1; 2;  CHEN Bin1; 2;  MOU Bing-xiong1; 2
(1. College of Architecture & Environment, Sichuan University, Chengdu 610065, Sichuan, China; 2. Key Laboratory of Deep Earth Science and Engineering, Ministry of Education, Sichuan University, Chengdu 610065, Sichuan, China)
Keywords:
hollow brick;  compressive strength;  variable coefficient;  Weibull distribution;  discreteness;  reliability
PACS:
TU362
DOI:
-
Abstract:
The compressive strength tests of three kinds of shale hollow bricks widely used in Sichuan area were carried out on different compressive surfaces. 90 hollow bricks with four, five and six holes were selected, and the number of each kind of hollow brick in compressive strength tests of large, strip and top surfaces was 30. The variable coefficient of compressive strength of hollow bricks with different holes and different compressive surfaces was calculated, and the strength discreteness of different hollow bricks with the same compressive surface and the same hollow bricks with different compressive surfaces was compared and analyzed. The response of normal distribution and Weibull distribution to the compressive strength distribution characteristics of shale hollow bricks was compared. Through Weibull distribution, the reliability of 9 groups of tests on the same compressive surface of different hollow bricks and different compressive surfaces of the same kind of hollow bricks was analyzed. The results show that Weibull distribution can better reflect the distribution characteristics of compressive strength of hollow bricks than normal distribution; the discreteness and reliability of compressive strength of hollow bricks are influenced by the type of holes; the discreteness of four-hole hollow bricks in three kinds of shale hollow bricks with the same compressive surface is larger, while the discreteness of compressive strength of six-hole hollow bricks is the smallest. The different compressive surfaces of the same kind of hollow brick also affect the discreteness and reliability of the compressive strength of the hollow brick. Among the three compressive surfaces of the same kind of hollow brick, the compressive strength of the top surface is significantly higher than that of the strip surface and the large surface, and the distribution of the compressive strength of the top surface is more concentrated, the dispersion is the smallest and the reliability is the best.

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Last Update: 2019-11-26