What is DLC?
DLC (Dry Lean Concrete) is a crucial component of modern stiff pavement. It is plain concrete with a higher aggregate-to-cement ratio than ordinary concrete, and it is commonly used as a stiff pavement base/sub-base. It works well on a flat surface that is uneven or unclean.
It's frequently utilized to produce a tight seal between bricks or other elements of infrastructure.
What is the grade of dry lean concrete?
| Grade Standard | M5 To M7.5 |
|---|---|
| Density | 2450 Kg/m3 |
| Application | Sub Base/Bedding |
| Compressive Strength | 40 KN |
What is the minimum curing period required for dry lean concrete?
Curing will begin as soon as the lean concrete surface has been compacted. Curing is accomplished by covering the surface with gunny bags/hessian and keeping it damp for 7 days by sprinkling water.
Dry Lean Concrete Mixing Ratio
The DLC mix is not comparable to traditional concrete mixes in terms of design. Unlike traditional concrete mixtures, the water/cement ratio is not a design requirement for the DLC mixture; instead, the optimal moisture content (OMC) is used to ensure total compaction of the concrete under lamination.
Because it becomes stuck in the roll drums, the mixture should not be too wet. As a result, determining the optimal moisture content for proper compaction and mixing ratios, i.e. the aggregate/cement ratio, is critical for achieving the required compaction and compressive strength of the concrete.
Concrete Strength of DLC
The major acceptance criterion for dry lean concrete mixtures is the cube's compressive strength after 7 days.
As a result, at 7 days, typical cubes made from dry lean concrete mixtures were tested for strength development.
Batching and mixing
The batching plant will be able to weigh each type of material independently and proportion the materials by weight. The aggregates will be weighed separately from the cement from the bulk supply. The batching and mixing plant's capacity should be at least 25% greater than the proposed capacity for the laying arrangements, and the batching and mixing plant should be equipped with the appropriate automatic controls to ensure proper proportioning and mixing. Other mixer types will be permitted if they can demonstrate satisfactory performance throughout the testing period.
Benefits of Dry Lean Concrete
- Provides even and greater support for the hard floor.
- It has a strong deformation resistance.
- Its increased load transfer efficiency at the joints is good.
- It's useful in all kinds of weather.
- Due to the use of DLC as a foundation layer, the slab's final depth is reduced.
