Core Raw Material—Cement - The Issues and Discussion of Modern Concrete Science - page 44

site and differences of construction technology and environmental climate, various
requirements are raised toward cement factory. Then, cement factory adjusts the
main components (C 3 S, C 2 S, C 3 A, C 4 AF), MgO, SO 3 , and

fineness of cement
freely according to the requirements, so as to produce cement that can ful ll

construction field demands and bring about most bene cial to concrete durability.

This kind of cement may be the best.

3.5 Ending Words

All in all, with the rapid development of machinery industry, the improved speed of
modern cement industry technology is ceaselessly accelerated and overpasses the
improved speed of concrete technology inevitably. It runs crazily like a runaway
horse which is driving the chariot of concrete. Current technology progress of
cement industry still regards 3- and 28-day strength as core content. However,
serious technical problems, such as intensi ed concrete shrinkage, more and more

severely cracking [ 6 , 7 ], increasingly poor durability, and so on, are all handed to
concrete worker to solve. At present, if an experienced engineer at construction site
is ignorant of cement, it will be rather dif

cult for him to solve a minor technical
quality problem of concrete. How to make the technology progress of cement
coordinate well with the technology progress of concrete and controllable is the
most important question that we need to solve in this era [ 8 ].

References

1. Lingshan Q (2001) The optimum particle size distribution of cement and its evaluation method.
Cement 8
2. Lingshan Q (2001) Cement particle parameters and their in uence on the performance of
cement and concrete. Cement 10
3. Lingshan Q (2002) Modern level and development trend of Portland cement. Cement 10
4. Wu X et al (2002) Study of high performance process of cement by adopting the method of
system. Cement 8
5. Peiyu Y (2001) The thoughts of high quality of cement. Cement 10
6. Weizu T (2002) Influence of performance on the structure durability and safety of concrete.
Concrete 6
7. Weizu T (2001) Shrinkage cracking and its evaluation and prevention of concrete. Concrete 7
8. Xiaojian G, Hengjing B (2001) Questions of the structure durability and cracking control of
concrete. Concrete 11