An Investigation of the Microstructure of Hardened Cement Pastes by Butane Sorption
Author: C. D. Lawrence
Publisher:
Published: 1982
Total Pages: 26
ISBN-13: 9780721012629
DOWNLOAD EBOOKRead and Download eBook Full
Author: C. D. Lawrence
Publisher:
Published: 1982
Total Pages: 26
ISBN-13: 9780721012629
DOWNLOAD EBOOKAuthor: Christopher Davison Lawrence
Publisher:
Published: 1981
Total Pages: 409
ISBN-13:
DOWNLOAD EBOOKAuthor: E. D. Lawrence
Publisher:
Published: 1981
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Peter Hewlett
Publisher: Butterworth-Heinemann
Published: 2019-03-06
Total Pages: 896
ISBN-13: 0081007957
DOWNLOAD EBOOKLea's Chemistry of Cement and Concrete, Fifth Edition, examines the suitability and durability of different types of cements and concretes, their manufacturing techniques and the role that aggregates and additives play in achieving concrete's full potential of delivering a high-quality, long-lasting, competitive and sustainable product. Provides a 60% revision over the fourth edition last published in 2004 Includes updated chapters that represent the latest technological advances in the industry, including, but not exclusive to the production of low-energy cements, cement admixtures and concrete aggregates Presents expanded coverage of the suitability and durability of materials aggregates and additives
Author:
Publisher:
Published: 1983
Total Pages: 562
ISBN-13:
DOWNLOAD EBOOKAuthor: Hubertus Henricus Willems
Publisher:
Published: 1985
Total Pages: 117
ISBN-13:
DOWNLOAD EBOOKAuthor: I. G. Richardson
Publisher:
Published: 1991
Total Pages: 628
ISBN-13:
DOWNLOAD EBOOKAuthor: Frederick Measham Lea
Publisher: Hodder Education
Published: 1998
Total Pages: 1274
ISBN-13:
DOWNLOAD EBOOKThis book deals with the chemical and physical properties of cements and concretes and their relation to the practical problems that arise in manufacturing and use. Much attention is given to the suitability of materials, to the conditions under which concrete may deteriorate, and to the precautionary or remedial measures that can be adapted.
Author: Yuting Wang
Publisher:
Published: 1995
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe characterization of the microstructure of a material should include two aspects: the identification of the microstructural elements in the material, and the quantitative characterization of these microstructural elements. In this research. the microstructure of hardened cement paste (hcp) was studied using BEI on polished surfaces coupled with image analysis. The microstructural elements evaluated included (a) pores detectable at the magnifications used, (b) CH crystals, (c) residual unhydrated cement particles, (d) hydrated phenograins, consisting of both hydration shells and fully hydrated cement grains, (e) combined phenograins, i.e. (c) and (d) combined as they occur in individual features, and (f) the C-S-H in the groundmass. The quantitative analyses assayed include both area fraction measurement and geometrical measurement of individual features. The latter provides information on size., shape, size distribution and mutual arrangement of the these individual features. Various hcps were investigated to quantitatively elucidate the effects of w:c ratio, age, and the incorporation of superplasticizer and silica fume on hcp microstructure. It was found that quantitative image analysis of hcp can yield interesting. and sometimes unexpected insights into the microstructure of hcp. The incorporation of superplasticizer and the incorporation of both superplasticizer and silica fume showed very strong effects on the hcp microstructure. On the other hand silica fume alone did not show strong effects. In another portion of this research, the fractal dimension characteristic of the pore system of hcp was investigated using an image analysis technique. It was found that the detectable pore system in cement pastes shows two fractal regimes: a structural fractal dimension exhibited at low resolution (Ds = 1.08 ~ 1.15) and a textural fractal dimension exhibited at higher resolution (Dt = 1.22 ~ 1.49). Finally, using a stereoscopic SEM method, it was found that the fracture surface of cement pastes shows two distinct fractal regimes: a structural fractal regime at low magnifications descriptive of the gross structural irregularities, and a textural fractal at high magnifications descriptive of the textural details of the fracture surface. The structural fractal and the textural fractal seem to have universal values of 2.02 and 2.12 respectively.