Lightweight concrete has several advantages compared to traditional concrete used in construction. It has better compressive strength, lower permeability, and improved thermal properties.
Increased compressive strength
Increasing the compressive strength of lightweight concrete is essential for structural purposes. This study aims to determine the effect of porous aggregate on the performance of lightweight concrete.
In the past, traditional building materials were replaced with lighter materials. However, lightweight materials are still limited due to their lower density and brittleness. These materials are typically made from natural or man-made aggregates.
The most effective way to increase the strength of concrete is to replace dense natural aggregates with porous lightweight aggregates. The effects of lightweight aggregates are not only visible in the mechanical properties of the concrete but also in the reduction of dead load.
Another notable feature of lightweight concrete is its low thermal conductivity. This property allows the material to withstand high temperatures without breaking down. The increased water content may lead to a compromise in the density of the concrete. Depending on the application, further water-reducing admixtures may be required.
Improved thermal properties
Various factors can affect the thermal properties of lightweight concrete. Some key factors include the amount of expanded glass granules and the density of PCM aggregates. These factors were investigated to understand the influence of these variables on the thermal properties of lightweight concrete.
For this study, six different concrete mixes were produced with the addition of expanded glass granules. The amount of granules varied from 10% to 50% by mass %. Increasing the number of granules did not significantly improve the concrete thermal conductivity and compressive strength.
The second stage of the study focused on the effects of impregnation of PCM on the mechanical and thermal properties of the concrete. Several techniques were evaluated to impregnate the PCM in the porous aggregates. The methods used included heat only, heat and pressure (autoclaving), and paraffin.
The initial stage of the study was aimed at determining the effect of phase change material on the mechanical and thermal properties of lightweight concrete. The results showed that including PCM aggregates in the concrete reduced the porosity and moisture absorption of the concrete. In addition, the pore structure of the concrete improved. The specific gravity of the concrete also increased.
In the next stage of the study, the sand content was altered in the mixture design to increase the compressive strength of the concrete. This technique was successful. The samples were filled with half of the moulds. The samples were then weighed after the water absorption test. The relative moisture content was defined as the mass ratio of actual moisture content to saturated moisture content.
Increasing the amount of sand in the lightweight concrete mixture increased the compressive strength and thermal conductivity. Further addition of sand to the mixtures resulted in an improvement of the thermal conductivity.
Reduced dead load
Using lightweight concrete can help to reduce the dead load of a structure. In addition, it can enhance fire resistance, thermal insulation, and sound absorption. In fact, lightweight concrete is used to build many structures, including bridges, multistory buildings, and sewer systems.
The advantages of lightweight concrete include lower cost, fewer transportation costs, and higher compressive strength. However, they also have disadvantages.
Generally, lighter-weight concrete has a lower density than normal concrete. In addition, it has a higher water content. It can be due to the need for more water-reducing admixtures. The lower density will also have a negative impact on the mechanical performance of the structure.
It is essential to keep in mind that the use of lightweight concrete may not be suitable for high-strength projects. It is also not recommended for buildings that need to hold a lot of permanent loads. So better to consult with Dekko Concrete to get the best one for you!
The modulus of elasticity, tensile-splitting strength, and compressive strength can measure the mechanical performance of concrete. It can also be characterized by the number of permanent and total moments.
Wide variety of textures
Aside from its innate tinker ability, it comes in various colours, textures, and finishes allowing you to repurpose it for any occasion. The best part is that it is as cheap as chips. It’s also the ideal vehicle for a lil’ paint job to boot! With the right tools and techniques, it’s a breeze to finish a masterpiece. And if you’re lucky, your guests might even think you’re the king of the castle! It’s not all that surprising if you’re the type who likes to keep your cool.
With the right tools and techniques, you can achieve the level of success you’d only dream of. And if you’re not into painting, you can still enjoy your concrete masterpiece. And when the sun goes down, you’ll have something to show off on your wall for years to come.