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Suppliers of Raw Materials: Cement  (1)

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Resistance of Portland Cement Mortar to Chemical Attack
[48 pages, 3,0 MB, PDF]
Publisher: William H. Kuenning, Portland Cement Assiciation
Cat: Materials Science: Mortars

Expanding admixture, non-shrinking waterproofing Portland cement with expanding admixture and the process of its production
aromatic acid performs the etching of the aluminate components in the admixture and portlandcement klinker. fatty acid protects the liberated aluminatoorganic complexes from the atmospheric agents, i.e. moisture and carbonic acid.
Publisher: Domenico Grilli (IT), Ghennady Michailovic Kirillov (RU), Boris Emmanuilovic Udovic (RU), 2004. EP1384704
Cat: Patents: Expansive Cements and non-shrinking Mortars

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

Pointing Mortar
Pointing grout with a maximum particle size of 0.4 mm. Based on white portland cement, white calcium aluminate cement (Secar 71) and a redispersible powder (Vinnapas LL 550). [133 kB, PDF, page 8]
Publisher: Münzing Chemie GmbH
Cat: Guide Formulations

Resistance of Portland Cement Mortar to Chemical Attack
A report on a study on the resistance of concrete to chemical attack by various inorganic and organic compounds, undertaken using mortar bars (1.5 x 1.5 x 10 cm). About 1200 specimens have been placed under test, many have been exposed for more than two years. [48 pages, 3,0 MB, PDF]
Publisher: William H. Kuenning, Portland Cement Association
Cat: Materials Science: Corrosion of Cementitious Materials

Mortar composition, useful as screed or flowable levelling compositions, comprises flow agents based on unsaturated mono/dicarboxylic acid (German)
A flowable mortar composition comprises Portland cement, additives based on powdered stone and latent hydraulic agents, aggregate, polymeric flow agents based on unsaturated mono- and/or dicarboxylic acid derivatives or oxyalkyleneglycol-alkenyl ethers and/or esters and a polymer dispersion and/or redispersible polymer powder based on vinyl-, acrylic or polyurethane polymers as well as water. The plasticizer acts as shrinkage-reducing agent.
Publisher: PCI Augsburg GmbH, 2001, DE10061410
Cat: Patents: Expansive Cements and non-shrinking Mortars

GCI Lime Mortars and Plasters Bibliography
The literature assembled in this bibliography includes articles and monographs on analytical techniques, case studies of materials from specific historic contexts, studies of conservation treatments, historical production and application materials and techniques, the parameters and effects of variations in the production process of lime mortars (calcining, slaking, binders and aggregates, additives, application, drying and carbonation), the chemistry and mineralogy of calcium hydroxide and calcium carbonates, the formation of compounds and reaction sequences in other classes of mortars (pozzolanics, natural hydraulic cements and ordinary portland cement). March 2003. [195 pages, 1.6 MB, PDF]
Publisher: Getty Conservation Institute (USA)
Cat: Materials Science: Mortars

High calcium sulfate expansive clinker
Expansive calcium sulfoaluminate clinker containing a high proportion of calcium sulfate is prepared and is included in portland cement (e.g., by intergrinding calcium sulfoaluminate clinker with portland cement clinker) to contribute expansive ...
Publisher: Povindar K. Mehta (Chemically Prestressed Concrete Corporation, Calif.), 1974, US3857714
Cat: Patents: Expansive Cements and non-shrinking Mortars

Chloride-free hardening accelerant for portland cement and process thereof
A chloride-free hardening accelerant for Portland cement which is active in particular at low temperatures and contains calcium nitrate, sodium nitrate, hexamethylenetetramine and sodium hydroxide.
Publisher: Hans-Rüdiger Braun, SKW Trostberg AG (Trostberg, DE), 1988, US4747877
Cat: Patents: Cement Set Accelerators

Strength enhancing additive for certain portland cements
Triisopropanolamine as strength enhancing additive for portland cements, containing at least 4% C4AF.
Publisher: Myers et al, W. R. Grace & Co.-Conn. (New York, NY), 1992, US5084103
Cat: Patents: Cement Set Accelerators

Levelling mortar
Two self levelling mortars, based on portland cement, with Melment F 10 as plasticising admixture and modified with redispersible powder (1.5% Mowilith DM 2020 P resp. 1.25% Vinnapas RE 523 Z). [133 kB, PDF, pages 10 and 11]
Publisher: Münzing Chemie GmbH
Cat: Guide Formulations: Levelling Mortars

Mechanisms of Degradation of Portland Cement-Based Systems by Sulfate Attack
Study on the mechanics of the associated expansion and cracking processes, carried out by exposing mortar and concrete specimens of different geometries (prisms, cylinders, and spheres) to sodium sulfate solutions with controlled pH.
Publisher: Ferraris et al. Proceedings of the Materials Research Society's Symposium on Mechanisms of Chemical Degradation of Cement-Based Systems. November 27-30, 1995
Cat: Materials Science: Sulfate attack

Method of producing stressing cement
A stressing cement is produced by mixing 58-62% by weight of Portland cement with an expanding component taken in an amount of 38-42% by weight. The expanding component consists of calcium sulphate, calcium oxide and an aluminate-containing material.
Publisher: Mikhailov et al, 1973, US3775143
Cat: Patents: Expansive Cements and non-shrinking Mortars

Establishing X-ray diffraction count rates which are generally applicable for quantitative differential analysis of Portland cement clinker
Synthetic clinker phases, industrial clinker and cements were examined quantitatively using X-ray diffractometry to establish generally applicable count rates.
Publisher: H. Vaupel, ZKG International, 12/2001
Cat: Analytical Chemistry of Construction Materials

Arenesulfonic acids as additives for portland cement (German)
Arenesulfonic acids could be used as accelerators or retarders due to addition of different concentrations to ordinary portland cement (OPC) pastes. The study focuses on the mechanism. With an English abstract.
Publisher: Stefan Andreas Stöber, Dissertation, 1999
Cat: Materials Science: Cements

Shrinkage compensating concrete with expansive additive
An expansive Portland cement incorporating an expansive additive which is a polymer incorporating a calcium compound reactive with the cement is described. The shrinkage compensating concrete produced is much less likely to crack and is used in slabs and other structural systems where cracking of the concrete is a problem.
Publisher: Soroushian et al (Board of Trustees operating Michigan State University, East Lansing, MI), 1996, US5489333
Cat: Patents: Expansive Cements and non-shrinking Mortars

White Cement: Problems of Production & Quality
Chemical composition, raw materials, production process, and properties of white portland cement. [7 pages, 254 kB, PDF]
Publisher: Konstantin Sobolev, in: Cement and Concrete World, July-August 2001, pp 34-42
Cat: Materials Science: White Cements

Dry set grout
A dry-set Portland cement based grout composition containing a cellulose ether (medium viscous HPMC, 'Methocel K4M'), an anionic polyacrylamide ('Separan AP 273'), and a bentonite clay (Thixojel #3).
Publisher: Tile Council of America Inc., 1984. US4447267
Cat: Patents: Polyacryl amide-based thickeners

Expansive cement
An improved expansive cement composition is provided which has the increased capability of being able to " grab" steel reinforcement members therewithin as the material is curing and expanding to result in effective stressing of the reinforcement members. This cement contains free CaO and some MgO uniformly distributed therein, with the remaining portion being primarily tricalcium silicate. The composition can be used directly as an expansive cement, or can be mixed with other cements such as Portland cements to impart expansive qualities thereto.
Publisher: General Portland Inc., 1977. US4002483 (Equivalent: DE2626126)
Cat: Patents: Expansive Cements and non-shrinking Mortars

Use of polypropylene glycol as additive for reducing the amount of shrinkage in dispersion powder compositions for building materials (German)
Polypropylene glycol (molecular weight 500 to 5000) is used as a shrinkage-reducing additive in dispersion powder compositions (addition rate 1 to 5%). The dispersion powder composition is particularly suitable for dry mortars which contain Portland cement as inorganic binder, and leads therein to lower shrinkage of the mortars.
Publisher: Wacker Chemie AG, 1993. EP0573036 (Equivalent: DE4218493)
Cat: Patents: Expansive Cements and non-shrinking Mortars

A Three-Dimensional Cement Hydration and Microstructure Program
Informations about hydration rate, heat of hydration and chemical shrinkage. A computer program has been developed that implements a three-dimensional model for the microstructural development occurring during the hydration of portland cement.
Publisher: Dale P. Bentz, National Institute of Standards and Technology
Cat: Materials Science: Cements

Expansive cement and its method of manufacture
A method of preparing an expansive cement having a controlled expansion and the same workability as normal Portland cement and the cement so prepared.
Publisher: Deets et al (United States Steel Corporation), 1975, US3861929
Cat: Patents: Expansive Cements and non-shrinking Mortars

False Set of Portland Cement (German)
Publisher: Andrea Glatthor
Cat: Materials Science: Cements

Shrinkage-reducing Additive (German)
New additives for reducing the shrinkage of building materials containing Portland cement from the group of alkanediols with terminal OH groups.
Publisher: Joachim Schulze, Horst Baumgartl, Wacker Chemie AG, 1987, DE3732114, EP0308950
Cat: Patents: Shrinkage-reducing Additives

Chloride-free set accelerated cement compositions and methods
Trihydroxybenzoic acid and disodium dihydroxybenzenedisulfonate (or derivatives) as accelerators for portland cements.
Publisher: Fry et al, Halliburton Company (Duncan, OK), 1992, US5127955
Cat: Patents: Cement Set Accelerators

Accelerator for portland cement derived from fertilizer
Method of producing a calcium nitrate composition, and the resulting composition, for use as a accelerator for time of set for portland cement in concrete and mortars comprising the steps of reacting a calcium ammonium nitrate hydrate composition with a tri- or tetramethylolglycoluril (TMGU) to crosslink with and convert the ammonia present therein into non-reactive, water-soluble components which exist in an aqueous medium at selected conditions of time, temperature, and pH.
Publisher: Michael F. Pistilli, Gifford-Hill & Company, Inc. (Dallas, TX), 1990, US4897120
Cat: Patents: Cement Set Accelerators


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