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Use of Water Reducers and Superplasticizers
Information about water-reducing admixtures, their retarding effect, and the ASTM C494.
Publisher: Pennsylvania State University - Concrete Clinic - Department of Civil & Environmental Engineering and Instructional Systems
Cat: Materials Science: Plasticizers for Concrete and Mortar

ASTM C806-95 Standard Test Method for Restrained Expansion of Expansive Cement Mortar
This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement.
Cat: Standards and Guidelines

ASTM C845-96 Standard Specification for Expansive Hydraulic Cement
This specification covers hydraulic cements that expand during the early hardening period after setting.
Cat: Standards and Guidelines

Hydrophob modified HEC as additive for
An additive for portland cement-based masonry mortar mixes is described which is based on hydrophob modified hydroxyethyl cellulose. Its essential property is a low level of adsorption onto portland cement. Key properties include good water retention even at elevated temperatures, air entrainment, good low-air workability, and flexural bond strength enhancement (meets the requirements of ASTM C 1329 for mortar cements). Its use level is around 0.007%; tradenames are Nexton M20W, M23W and M25W.
Publisher: Hercules Inc., 2000. US6068696 (Equivalents: EP1098861, DE69903173)
Cat: Patents: Thickener, Rheological Additives

Alkali-Silica Reaction and High Performance Concrete
Answers the question if high-performance concrete is susceptible to alkali-silica reaction. The paper contains details on the alkali-silica reaction mechanism and the factors influencing it as well as an overview on available test methods (i.e. ASTM C1260 and C227). Besides an abstract the fulltext is available as PDF (24 pages, 1,3 MB).
Publisher: C.F. Ferraris, Building and Fire Research Laboratory, National Institute of Standards and Technology, 1995
Cat: Materials Science: Alkali-Silica Reaction in Concrete

ASTM C618 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Concrete
A table with chemical and physical requirements listed in the ASTM C618 specification for the three classes of pozzolans: Class N, Class F, and Class C.
Publisher: Coal Ash Resources Research Consortium, (CARRC)
Cat: Materials Science: Pozzolana (Fly Ash, Microsilica, Tuff, Volcanic Ashes) and latent hydraulic materials (blast furnace slag)

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Keywords:
ASTM-C1260
ASTM-C227
ASTM-C494
ASTM-C618
ASTM-C806
ASTM-C845

705 Links in 142 Categories. [2010-07-29]