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Types of Cement II

Types of Cement II

Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate resistance.

Strength of Cement

Strength of Cement

Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in ASTM C...

Types of Cement I

Types of Cement I

Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...

Mortar

Mortar

Mortar, a mixture of Portland cement, hydrated lime, sand, and water, is a crucial binding material in construction. Its primary function is to join masonry units together, filling gaps and ensuring a uniform distribution of weight across the structure. This helps in preventing potential weaknesses. Mortar also serves as a protective barrier against environmental elements such as water and wind, thereby safeguarding the interior of the structure. It also compensates for surface irregularities...

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Related Experiment Video

Updated: Jul 14, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Cements for use in esthetic dentistry.

Thiago A Pegoraro¹, Nelson R F A da Silva, Ricardo M Carvalho

¹Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Bauru, Al. Otávio P. Brisola 9-75, São Paulo, Brazil.

Dental Clinics of North America

|May 30, 2007

Summary

Dental cements secure restorations, with resin-based types favored for aesthetics. Proper surface treatment and adhesive selection are crucial for successful, long-lasting dental cementation, especially with modern esthetic materials.

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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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Published on: July 10, 2014

Area of Science:

Dental Materials Science
Restorative Dentistry

Background:

Dental cements are essential for retaining restorations and prosthetics in the oral environment.
Conventional glass ionomer and zinc phosphate cements are common for metallic restorations, while resin-based cements are used for esthetic applications.

Purpose of the Study:

To highlight the importance of material selection and procedural techniques in dental cementation.
To emphasize factors critical for the successful luting of esthetic restorations.

Main Methods:

Review of current dental cement types and their applications.
Discussion of surface treatment protocols, including silane application.
Analysis of adhesive-cement compatibility for various curing mechanisms.

Main Results:

Successful cementation of esthetic restorations depends heavily on proper internal surface treatment and silane application.
Clinicians should use specific adhesive systems (three-step total-etch or two-step self-etch) to prevent incompatibility issues with chemical- or dual-cure cements.

Conclusions:

Operator awareness of cementation mechanisms and material limitations is vital for reliable procedures.
Appropriate material choice and technique are key to achieving stable and long-lasting restoration retention.