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Concrete

Concrete

Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...

Design Example: Sustainability in Concrete Building

Design Example: Sustainability in Concrete Building

As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...

Effect of Sea Water on Concrete

Effect of Sea Water on Concrete

Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...

Design Example: Managing Concrete Workability

Design Example: Managing Concrete Workability

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.

Workability of Concrete

Workability of Concrete

The workability of concrete is a crucial property that affects its handling, placing, and finishing during construction. It describes the ease with which concrete can be mixed, placed, compacted, and finished. Workability is primarily concerned with the concrete's movement and its ability to resist internal friction and external resistance from molds and reinforcements during the application process.
Concrete's workability is determined by its resistance to internal forces that arise...

Frost Resistant Concrete

Frost Resistant Concrete

Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...

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Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests

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How sustainable was ancient Roman concrete?

Daniela M Martinez¹, Sabbie A Miller², Paulo J M Monteiro³

¹Department of Civil and Environmental Engineering, Universidad del Norte, Barranquilla 081007, Colombia.

|September 15, 2025

Summary

Roman concrete

Keywords:

Engineering Environmental science

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Area of Science:

Materials Science
Environmental Science
Chemical Engineering

Background:

Roman concrete's exceptional durability suggests potential for sustainable building materials.
Limited life cycle assessment data exists for Roman concrete compared to modern formulations.
Understanding its environmental impact is crucial for evaluating its modern applicability.

Purpose of the Study:

To conduct a comprehensive life cycle assessment (LCA) of Roman concrete formulations.
To compare the environmental impacts of Roman concrete with modern concrete production.
To identify sustainability benefits and challenges of adopting Roman concrete practices.

Main Methods:

Utilized life cycle assessment (LCA) methodology.
Quantified environmental impacts including greenhouse gas emissions, energy demand, particulate matter, and water use.
Compared various Roman concrete recipes against contemporary cement production.

Main Results:

Roman concrete formulations may not significantly reduce emissions or energy demand with current technology alone.
Biomass fuel use in Roman practices offers a pathway for decarbonizing modern cement production.
Environmental impacts vary nuancedly across different Roman concrete compositions.

Conclusions:

Direct adoption of Roman concrete with modern tech may not guarantee sustainability gains.
Roman reliance on biomass fuel is a key takeaway for sustainable modern cement manufacturing.
Further research is needed to integrate historical practices with modern decarbonization strategies.