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Related Concept Videos

Types of Cement I01:21

Types of Cement I

313
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...
313
Fineness of Cement01:15

Fineness of Cement

420
The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...
420
Types of Cement II01:22

Types of Cement II

347
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...
347
Aggregate Cement Ratio01:21

Aggregate Cement Ratio

497
The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...
497
Strength of Cement01:20

Strength of Cement

407
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...
407
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

256
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
256

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Related Experiment Video

Updated: Jan 4, 2026

Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence
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Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence

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Characterization data of reference cement CEM I 42.5 R used for priority program DFG SPP 2005 "Opus Fluidum Futurum -

Z C Lu1, M Haist2,3, D Ivanov4

  • 1Department of Civil Engineering, Technische Universität Berlin, 13355, Berlin, Germany.

Data in Brief
|November 14, 2019
PubMed
Summary

This study presents comprehensive characterization data for CEM I 42.5 R reference cement, crucial for fundamental research in cement science. The findings provide essential baseline data for ongoing German Research Foundation (DFG SPP 2005) projects.

Keywords:
CharacterizationDFG SPP 2005Portland cement

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Area of Science:

  • Materials Science
  • Civil Engineering
  • Chemistry

Background:

  • Thorough characterization of cement is essential due to its complex multi-phase composition.
  • Standardized reference materials are vital for reproducible scientific investigations.
  • The German Research Foundation's Priority Program 2005 (DFG SPP 2005) requires well-defined starting materials.

Purpose of the Study:

  • To present detailed characterization data for the CEM I 42.5 R reference cement.
  • To establish a reliable baseline for research within the DFG SPP 2005.
  • To consolidate data from multiple research groups for consistency.

Main Methods:

  • Chemical composition analysis.
  • Mineralogical phase identification.
  • Physical and chemical property testing.
  • Data aggregation and statistical analysis (mean values and errors).

Main Results:

  • Comprehensive dataset covering chemical, mineralogical, physical, and chemical properties of CEM I 42.5 R.
  • Calculated mean values and errors for all reported data points.
  • Successful data consolidation from nine participating research groups.

Conclusions:

  • The presented characterization data serve as a vital resource for the DFG SPP 2005.
  • This standardized data enhances the comparability and reliability of research outcomes.
  • The study underscores the importance of well-characterized reference materials in complex scientific programs.