Concrete may look rigid and immovable, but a concrete structure is continuously subjected to dimensional changes throughout its service life. Changes in temperature, drying shrinkage, creep, moisture and other environmental effects can cause concrete to expand, contract or deform. If these movements are restrained, stresses can develop within the concrete. When the induced tensile stress … Read more
Selecting the most appropriate lubricant is an important part of keeping industrial equipment operating reliably. The lubricants available from RS encompass products designed with a broad range of applications, machinery types, and operating environments in mind. Of course, there is no single lubricant that suits every conceivable industrial application. So, organisations cannot depend on “just … Read more
Steel is considered to be one of the vital construction materials. The process of construction involves the bending of steel to a particular form. Consequently, it is important to check the ductility of the steel, which is the ability to deform under applied pressure. Bend and Rebend Test This test procedure is used to check … Read more
Establishing a reliable relationship between rebound hammer numbers and the compressive strength of concrete is a crucial aspect of quality control in construction projects. This correlation serves as a valuable tool for rapid, non-destructive assessment of concrete strength in both existing and under-construction structures. The rebound hammer test offers a quick and cost-effective method to … Read more
Sustainability of Concrete Concrete is everywhere. From foundations and retaining walls to bridges, dams, high-rise buildings, industrial plants and roads, modern infrastructure would be almost impossible to imagine without it. But concrete has a sustainability problem. The issue is not really concrete itself. The biggest environmental impact comes from the cement used to make concrete—particularly … Read more
Introduction to the 30% Productivity Target For many years, the construction industry has faced a major challenge. Projects often run over budget. They also take longer than planned. In 1994, Sir Michael Latham published a famous report called Constructing the Team. In this report, he suggested a bold goal. He stated that the construction industry … Read more
Activity Sampling Method to Measure Construction Productivity In the construction business, managing efficiency is a major key to financial success. However, construction projects face unique challenges. Unlike a factory, a construction site is not a controlled environment. Assembly line workers repeat the exact same task in a stable workspace. In contrast, construction workers face hundreds … Read more
Determining the optimum dosage of a superplasticizer is essential for achieving the desired workability, strength, and durability of concrete while avoiding unnecessary admixture consumption. Two of the most widely used laboratory methods for this purpose are the Marsh Cone Test and the Mini Slump Cone Test. In this article, you will learn both methods step … Read more
Solid Content Test of Admixture Chemical admixtures have become an essential component of modern concrete, particularly when high workability is required without increasing the water content. Depending on the product, admixtures are supplied either as liquids or as powders. Solid content of admixture impacts its properties. Measuirng solid content helps in following ways. Test Summary … Read more
Strength Activity Index (SAI) Test (ASTM C311/C311M) Ordinary Portland Cement (OPC) production is highly energy-intensive and contributes significantly to carbon emissions. To reduce cement consumption and improve sustainability, supplementary cementitious materials (SCMs) are incorporated into concrete. Many of these materials exhibit pozzolanic properties, meaning they react with calcium hydroxide [Ca(OH)₂], a by-product of cement hydration, … Read more
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