Introduction of the development of China's cement strength automatic pressure testing machine and industry standards.doc

2004-No. I1 Water-cooled CEMEMT

Introduction of China's Cement Strength Automatic Pressure Tester and Industry Standards

Xiao Zhongming, Zhang Datong, Yan Bilan, Song Litai

(Institute of Cement Science and New Building Materials, China Academy of Building Materials Science. Beijing 10 (1024)

CLC number: TQ172.16 Document identification code; B Article number: 1002-9877 (2 (X74) 11-M63-03

0 Preface

The pressure testing machine is one of the main equipments of the cement mortar strength test method, and its quality has a direct influence on the accuracy of the cement strength test. In order to ensure the accuracy, reliability and comparability of strength results, China's cement mortar strength test method specifies the accuracy of the pressure tester and the loading speed at the time of application.

With the implementation of CB / T17671-1999 <Cement mortar strength inspection method), the development and production of automatic pressure testing machines in China have reached a climax, but some problems have also been found in actual operation, such as the definition of "white motion" Some manufacturers add the automatic data collection system to the manual press: the force machine is called "automatic press", and some adopt the microcomputer also called "automatic press". The Chinese Ministry of Machinery has formulated a cement strength test. JB / T8763 (Technical conditions of electro-hydraulic cement pressure testing machine>, because the detection of loading speed in this condition uses the stopwatch segmentation calculation method, there is no need to detect the instantaneous loading speed of the pressure testing machine, especially the instant of breaking Therefore, many manufacturers regard this condition as the basis of "automatic presses", and users do not know the details.

In order to better regulate the production of China's cement strength automatic pressure testing machine and improve its inspection methods to ensure the accuracy and reliability of the loading speed, the original State Economic and Trade Commission issued the "2003 Industry" in 2003 by the State Economic and Trade Department Industry [2003] No. 22 document. The Standard Project Plan requires the China Academy of Building Materials Science to develop the industry standard for cement strength white dynamic pressure testing machine building materials. In order to let everyone understand the current status of cement automatic presses in China and the progress of work, we will now introduce the formulation of industry standards for cement strength automatic pressure testing machines.

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