Scientific Foundation of Modern Concrete - The Issues and Discussion of Modern Concrete Science - page 175

Theory is soul of any scienti c work. If there was something wrong with theory,

scienti c work would have no foundation and become chaotic. Therefore, as

contemporary scienti

c worker of us, we have the responsibility to make proper
supplement and correction on the parts of concrete scienti c basic theory which is

unsuitable for modern environmental condition. This question has been checked
repeatedly by author at different construction field in different areas in China.

This chapter consists of amendment and supplement on old concrete theory,
proposed viewpoint and summary by means of combining engineering experience,
consulting scienti

c information in nearly 20 years. Data collection began in 1998
at Lanzhou airport, and field experiment on some proposed questions in this chapter

started to be carried out in 2000 at Urumchi airport, and first edition of this chapter

was not '

time. When accomplished, the manuscript was sent to be checked by authoritative
experts in China whom are familiar with the author for purpose of listening to their
opinions. It can be said that the manuscript had caused relatively

finished until 2005 at Hohhot airport, which had gone through 7 years

erce debate

within industry.
From 2006, focusing on parts in this chapter where experts opposed opinions
were more centralized, the author stepped into

field, in search of finding proof and

'

carrying out experiment and summary. It took 5 years nal

supplement and amendment of this chapter when it was 2010 at Kunming Airport.
New research and summary should be conducted on scientific principle of
modern concrete, yet it may be Arabian Nights for us to just rely on individual
strength. For classical equation and theory, we have used for 50 years or even a
hundred of years, deviation and error frequently happens when guiding practice,
this is just the root the topic wants to discuss. The author acknowledges that writing
this chapter is overcon

time to finish the

cult it is to
improve the past, old but also classical theory. As a result, this chapter has just
proposed nothing more but a train of thought or clue. The main purpose is to throw
a sprat to catch a whale and generate thought. This revolutionary work may be

dent and cannot rave that it is true. How dif

finished under corporate working of contemporary, or even several generations.

15.1 Discovery of the Problem

1. Inadaptability of old concrete theory

The most fundamental elements of concrete are coarse aggregate, sand, cement,
mix proportion and their effect on concrete performances, which are also foundation
of this subject. If we compared concrete science as a big tree, they were root of this
big tree. With development and advancement of modern concrete science and
technology, understanding about these roots has changed, as listed in the following.