Title:
Back to the Future
Author(s):
Pierre-Claude Aïtcin and Sidney Mindess
Publication:
Concrete International
Volume:
37
Issue:
5
Appears on pages(s):
37-40
Keywords:
clinker, superplasticizer, rheology, durability
DOI:
10.14359/51687831
Date:
5/1/2015
Abstract:
For many years, the North American cement industry was well served by the so-called Type I/II cements. This type of cement had C3A contents below 6.5%. While concrete produced with this cement did not exhibit high early strength, it did exhibit good durability. The cement industry is now producing clinkers with higher C3A contents, and these clinkers are also being ground finer to provide high early strength. These changes make it much more difficult to control the rheology of low water-cement ratio mixtures produced with modern admixtures. The authors recommend that the industry produces an alternative cement with a C3A content of about 6% and a coarser grind than currently available.
Related References:
1. Hattori, K., “Experiences with Mighty Superplasticizer in Japan,” Superplasticizers in Concrete, SP-62, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 1979, pp. 37-66.
2. Meyer, A., “Experiences with the Use of Superplasticizers in Germany,” Superplasticizers in Concrete, SP-62, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 1979, pp. 21-36
3. Kreijger, P.C., “Plasticizers and Dispersing Admixtures,” Proceedings of the International Congress on Admixtures, The Construction Press, London, UK, Apr. 16-17, 1980, pp. 1-16.
4. Hewlett, P.C., and Rixom, R., “Superplasticized Concrete,” ACI Journal Proceedings, V. 74, No. 5, May 1977, pp. N6-N11.
5. Féret R., “Sur le compacité des mortiers hydrauliques,” Annales des Ponts et Chaussées, V. IV, 1892, 2nd semester, pp. 5-161.
6. Abrams, D.A., “Design of Concrete Mixtures,” Bulletin 1, Structural Materials Research Laboratory, Lewis Institute, Chicago, IL, 1918, 20 pp.
7. Ryell, J., and Bickley, J.A., “Scotia Plaza: High Strength Concrete for Tall Buildings,” Proceedings of the Symposium on Utilization of High Strength Concrete, Stavanger, Norway, 1987, pp. 641-654.
8. Howard, N.L., and Leatham, D.M., “The Production and Delivery of High-Strength Concrete,” Concrete International, V. 11, No. 4, Apr. 1989, pp. 26-30.
9. Helene, P., and Hartmann, C., “HPCC in Brazilian Office Tower,” Concrete International, V. 25, No. 12, Dec. 2003, pp. 64-68.
10. K.H. Khayat and D. Feys, eds., Design, Production and Placement of Self-Consolidating Concrete, Proceedings of SCC2010, V. 1, Montreal, QC, Canada, 2010, 458 pp.
11. Nielsen, A.U., and Aïtcin P.-C., “Properties of High-Strength Concrete Containing Light-, Normal-, and Heavyweight Aggregate,” Cement, Concrete and Aggregates, V. 14, No. 1, July 1992, pp. 8-12.
12. Laplante, P.; Aïtcin, P.-C.; and Vezina, D., “Abrasion Resistance of Concrete,” Journal of Materials in Civil Engineering, ASCE, V. 3, No. 1, Feb. 1991, pp.19-28.
13. Aïtcin, P.-C., High Performance Concrete, E&FN Spon, London, UK, 1998, 591 pp.
14. Roth, M.J.; Rushing, T.S.; Flores, O.G.; Sham, D.K.; and Stevens, J.W., “Laboratory Investigation of the Characterization of Cor-Tuf Flexural and Splitting Tensile Properties,” Report ERDC/GSL TR-10-46, Geotechnical and Structures Laboratory, U.S. Army Corps of Engineers, Vicksburg, MS, Oct. 2010, 56 pp.
15. Bache, H.H., “Densified Cement/Ultra-Fine Particle-Based Materials,” Second International Conference on Superplasticizers in Concrete, Ottawa, ON, Canada, June 10-12, 1981, 12 pp.
16. Richard, P., and Cheyrezy, M.H., “Reactive Powder Concretes with High Ductility and 200-800 MPa Compressive Strength,” Concrete Technology: Past, Present, and Future, SP-144, P. Kumar Mehta, ed., American Concrete Institute, Farmington Hills, MI, 1994, pp. 507-518.
17. Jolicoeur, C.; Nkinamubanzi, P.-C.; Simard, M.-A.; and Piotte, M., “Progress in Understanding the Functional Properties of Superplasticizers in Fresh Concrete,” Fourth CANMET/ACI International Conference on Superplasticizers and Chemical Admixtures in Concrete, SP-148, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 1994, pp. 63-88.
18. Kim, B.-G.; Jiang, S.P.; and Aïtcin, P.-C., “Effect of Sodium Sulfate Addition on Properties of Cement Pastes Containing Different Molecular Weight PNS Superplasticizer,” The Sixth CANMET/ACI Conference on Superplasticizers and Other Chemical Admixtures in Concrete, SP-195, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 2000, pp. 485-504.
19. Nkinamubanzi, P.-C.; Kim, B.-G.; Saric Coric, M.; and Aïtcin, P.-C., “Key Cement Factors Controlling the Compatibility between Naphthalene-Based Superplasticizers and Ordinary Portland Cements,” 6th ACI/CANMET International Conference on Superplasticizers and Other Chemical Admixtures in Concrete, Supplementary Papers, 2000, pp. 33-54.
20. Regourd, M., “Physico-Chemical Studies of Cement Pastes, Mortars, and Concretes Exposed to Sea Water,” Performance of Concrete in Marine Environment, SP-65, V.M. Malhotra, ed., American Concrete Institute, Farmington Hills, MI, 1980, pp. 63-82.
21. Moranville, M., and Robert, F., “Pathologies du béton,” Ecole thématique physique, chimie et mecanique des matériaux cimentaires (School of Physics, Chemistry, and Mechanics of Cementitious Materials), ATILH, Paris, France, Sept. 2008, pp. 1-47.
22. Bentz, D.P.; Bognacki, C.J.; Riding, K.A.; and Villarreal, V.H., “Hotter Cements, Cooler Concretes,” Concrete International, V. 33, No. 1, Jan. 2011, pp. 41-48.
23. Brewer, H.W., and Burrows, R.W., “Coarse-Ground Cement Makes More Durable Concrete,” ACI Journal Proceedings, V. 47, No. 1, Jan. 1951, pp. 353-360.
24. Mehta, P.K., and Burrows, R.W., “Building Durable Structures in the 21st Century,” Concrete International, V. 23, No. 3, Mar. 2001, pp. 57-63.