CIVIL YAAR

CONCRETING OPERATIONS Operations followed in the making of concrete in compliance with the safety and quality requirements are known as concreting operations. Concreting operations include: Storage of materials; Batching and Mixing of various ingredients; Concrete mix transportation; Concrete placing; Compaction of concrete; Surface finishing; and Curing of concrete. PURPOSE Concreting operations are vulnerable to safety and health hazards. This method statement describes the safety requirements and safe work procedure for concreting operations to: Prevent improper carrying out of concreting works; Carry works in a manner that’s safe at all times; Know the hazards involved in performing the activity; Ensure controls are in place to steer clear of hazard exposure. Use any other resources and methods not referred to in this method statement to suit the project requirement. Execute the work safely complying with the required standard. The sequence of activities is a repetitive process an

    👉 What is batching of concrete?   Batching of concrete means measuring different ingredients of concrete (i.e. cement, sand, coarse aggregate and water) before mixing it. When this measurement is done on the basis of volume, we call it Volume Batching.     👉 What is a small batching plant? Small batching plant is suitable for places that require extreme mobility. There are two models available which are powered by electric motors and there is one model powered by diesel engine. There are total of three bins for addition of sand, cement and aggregates. All the bins are with individual load cells for accurate weighing. Methods of  Batching  Concrete 1. Volume Batching In volume batching, materials are measured on the basis of volume. It is less precise method of batching Measurement boxes or gauge boxes of known volume are used to measure materials. Cement is taken in the form of bags, where volume of one bag of cement (50 kg) is taken as 35 liters. Volume of Gauge box used is made

What is the maximum height limit for concrete construction for 1 day?                                            Sometimes specifiers and inspectors dictate the maximum free-fall distance of concrete because they believe limiting free fall is necessary to minimize concrete segregation.       Usually they limit the free-fall distance to 3 to 5 ft (0.9 to 1.5 m), but occasionally the limit is as little as 2 ft (0.6 m). Neither ACI 301- 99, “Specifications for Structural Concrete,” nor ACI 318-02, “Building Code Requirements for Structural Concrete,” limit the maximum distance concrete can free fall. ACI 304R-00, “Guide for Measuring, Mixing, Transporting, and Placing Concrete,” states that “if forms are sufficiently open and clear so that the concrete is not disturbed in a vertical fall into place, direct discharge without the use of hoppers, trunks, or chutes is favorable.” ACI 301, 304, and 318, however, all require placing the concrete at or near its final position to avoid segregatio

👉  Why is only concrete used for construction but not only cement? Understanding the fundamental differences of  cement  and  concrete  is important.  Cement  is an ingredient in  concrete , and  concrete  is the finished product  used  in building foundations, driveways, roads, homes, and the infrastructure around you. [0] Among all the construction materials used in the world, concrete is most widely used due to its unique advantages compared to other materials. Concrete Hardens at Ambient Temperature. Concrete sets , hardens, gain its strength at regular room temperature or ambient temperature. Ability to be Cast into Shape. Fresh concrete is flowable and is in liquid state. Energy Efficiency in Production. The amount of energy required for production of concrete is low compared with steel. Excellent Water Resistance Characteristics. Though chemical in water can induce corrosion in concrete and reinforced concrete. High-temperature resistance. Concrete can withstand high temperatur