This document contains a guideline specification that may be used to build project requirements for roller compacted concrete (RCC) as an exposed RCC pavement surface that can be diamond ground for smoothness and/or texture. This specification does not include RCC as a base or subbase layer. The base material should be tested to ensure that it meets the required specifications prior to using it as the base course for RCC.
Roller-compacted concrete (RCC) is a dense, hardening concrete that rolls out of the truck bed like a brick and uses small steel rollers to pack the concrete while it cures. The result is a strong, lightweight concrete with a fine, granular appearance. It's commonly used as a building material for roads, runways, and parking lots because of its aesthetic quality and its ability to absorb shock loads from vehicles without breaking down. However, RCC has some drawbacks that must be taken into account when selecting this type of pavement for a project. The most significant is the need for a suitable substrate upon which to mount the roller units. If the substrate cannot support its own weight, the job will have to be done in two stages: first, pour the RCC over a base course; then, once it has cured, remove the RCC roller units and lay a second layer of RCC over the cured base course layer.
Self-compacting concrete (SCC) is a type of concrete that, because to its exceptional deformability, can be laid and consolidated under its own weight without any vibration effort, while remaining cohesive enough to be handled without segregation or bleeding. This means that SCC is easy to use and does not need any tools for application or finishing.
Its advantages over traditional concrete include reduced job site time, no requirement for mechanical vibrators to consolidate the wet mix before it hardens, no need for dust masks when applying the mix, and reduced noise during placement and curing of the material. Self-compacting concrete is suitable for all types of applications requiring a high-quality finish, such as driveways, patios, and walkways. It is also useful where access by machine is difficult, such as near buildings or underneath trees. The lack of vibration required during placement helps prevent damage to the surrounding area.
Disadvantages of self-compacting concrete include increased cost compared with conventional concrete, which is due primarily to the fact that fine aggregates are required to provide sufficient volume for good workability and strength. Coarse aggregate must be used to ensure proper drainage. Self-compacting concrete also requires more careful monitoring and supervision during delivery and placement to avoid creating pockets of air that will cause the mixture to become unworkable.
RCC, or Reinforced Cement Concrete, is the reinforcement of cement concrete with mild steel bars. Steel bars are classified into two types: round and torsion. The foundation, beam, column, and slab are the various components of RCC construction. These may be made by combining the appropriate amounts of cement, sand, and gravel with water and steel bars. The forms used to shape the concrete serve as the mold for the final product. The concrete should be mixed thoroughly and allowed to cure before the forms are removed.
Round bar reinforcing is used in concrete structures where maximum strength and minimum weight are required. Round bars are available in sizes from 2 inches (50 mm) up to 12 inches (300 mm). They can be solid or hollow. Hollow bars reduce the amount of material needed for a given structure size; this lowers costs. They also allow more space within the concrete for other materials such as aggregate or coarse vermiculite.
Torsion bar reinforcing is used in concrete structures where greater ductility is required than round bar reinforcing will provide. Torsion bars have longitudinal slots that allow them to twist instead of break when under tension. They can be used instead of rebar where uniform tension loads are expected but where resistance to rotation is required as well. For example, torsion bars can be used to reinforce beams that will be hit by vehicles but which will still allow the vehicle to pass over them.
Because ACC PSC concrete has a larger density than OPC concrete, it increases the durability of concrete constructions. The age factor does not affect the performance of this cement.
ACC stands for Acryl-Coated Cement. This is a type of cement that has acrylonitrile added to it. This helps improve the workability of the cement and also makes it more flexible. This type of cement is used in applications where high strength is required such as in bridges and buildings.
ACCP is an association which develops standards for the construction industry. They develop tests to see if cements meet their requirements and they also publish information about new cements that come on to the market.
Their main goal is to help builders choose the right cement for their projects. They do this by publishing technical articles about different types of cements as well as their properties. They also conduct laboratory and field trials of cements to see how they perform under real world conditions.
There are two types of acrylic cements: polymer-modified cements and polymer-based cements.