Cement-bound road mixture formation

Home » Services » Cement-bound road mixture formation

Cement-bound mixture formation service

Asfalti Piovese provides cutting-edge solutions for cement-bound road mixture formation, a fundamental technique for guaranteeing the durability and resistance of road paving. Our experience and expertise enable us to guarantee high quality results for projects of all sizes.

The in-situ cement-bound mixture is made by using special machinery and is used in road paving as a foundation layer on which the bituminous conglomerates will be laid in all cases where the load bearing capacity needs to be increased.

What is cement-bound road mixture?

Cement-bound road mixture is a mix of aggregates, cement, and water, used as a base layer for road construction. This composition creates a solid and long-lasting base, essential for the stability of road surfaces. Its main characteristic is its ability to provide strong, even support for the layers above. It is specifically used in situations where the road structure needs to have a high load-bearing capacity (e.g. airport runways, viaducts).

Cement-bound mixture formation procedure

The cement-bound mixture formation procedure is divided into several stages.

Site preparation by cleaning and levelling the work area.
Mixing the aggregates, that is, combining sand, gravel and crushed stone.
Adding the cement according to a precise dosage.
Hydration, that is, adding water to activate the chemical reaction.
Laying and compacting the mixture to ensure an even and hard-wearing surface.

We use mixing machines to form the cement-bound mixture, guaranteeing homogeneity, and compacting rollers to obtain the desired density and compactness.

Composition and dosage

The cement-bound mixture is made in situ by bringing in a granular mixture from a quarry, followed by mixing with cement in a percentage varying between 3% and 5% of the weight of the aggregates, and water.

The dosage of the ingredients is crucial to obtain the desired characteristics. The correct ratio between aggregates, cement and water depends on the project specifications and site conditions, so as to ensure a homogeneous and high-performance mixture.

The grain size curve of the granular mixture must be continuous and uniform; the aggregates must be polyhedral in shape and have a percentage loss in weight due to abrasion under the Los Angeles test of less than 30%, and in any case have the mechanical properties specified in the relevant technical specifications.

It is applied in approximately 20 cm thick layers, and in any case not less than 10 cm. A motor grader equipped with a GPS system is used for the final levelling of the surface.

Rules and regulations

Current rules for cement-bound mixture

The creation and use of cement-bound mixture must comply with specific technical rules regarding the properties and characteristics of both the materials used and the final soil. It mainly concerns three standards:

UNI EN 14227-1 – Cement-bound mixtures for road bases and sub-bases;
UNI EN 14227-5 – Mixtures bound with hydraulic binder for roads;
UNI EN 14227-15 – Stabilised soil with hydraulic binder.

Certifications and quality standards

Material certification and quality standards in laying are essential to ensure that the material and laying technique achieve the expected results and performance, in compliance with the Technical Standards for Construction.

To guarantee conformity, Asfalti Piovese requires testing laboratories that can test the characteristics of both the unbinder mixture and the fresh or hardened cement-bound mixture as required by industry standards.

Cement-bound mixture technical data sheet

The cement-bound mixture technical data sheet provides detailed information on the composition and properties of the mixture. It includes data on strength, aggregate grading and proportions of cement used, ensuring the end product meets the required standards.

Discover our works

Projects

Cement-bound mixture road applications

In the case of road, airport, port and railway sub-foundations, and sub-foundations for squares and car parks subjected to high operating loads, it is advisable to apply a fibre-reinforced cement-bound mixture, which performs better than traditional cement mixtures because of the addition of metal or polymer fibres.

Cement-bound mixture advantages

The advantages of cement-bound mixture include:

stability and durability, because it guarantees a solid base for paving, reducing the risk of subsidence;
versatility, as it can be used in various contexts, from urban roads to motorways, from airports to large car parks;
cost-effectiveness, reducing long-term maintenance costs due to its resistance and stability.