Portland, Maine

Abstract: The study investigated the workability, and compressive strength properties of the concrete produced by replac-ing 5%, 10% and 15% by weight of ordinary Portland cement with Sawdust Ash (SDA). Slump test was carried out on the fresh concrete and compressive strength test on hardened concrete. The concrete cubes were tested at the ages of 3, 7, 14 & 28 days. The results showed that Sawdust Ash is good with use in cement. The slump decreased as the Sawdust Ash content increased…

3. MIX DESIGN 3.1 Design of Geopolymer Concrete Mixtures: In the mix design of geopolymer concrete the role and the influence of aggregates are considered to be the same as in the case of Portland cement concrete. The mass of combined aggregates may be taken to be between 75% and 80% of the mass of geopolymer concrete. Coarse and fine aggregate together were taken as 77% of entire mixture by mass. Fine aggregate was taken 30% of total aggregate. Fly ash and alkaline liquids was taken 23% of…

1. At Marino Rocks there is a substantially difference between the rock types on the ‘beach’. Some of these are grain size, age, complexion very common rock types that can be found at Marino Rocks include: sandstone and siltstone. Sandstone is a sedimentary rock composed of sand-sized grains of mineral, hence why its called ‘SAND-stone’. It also contains a cementing material that binds the sand grains together. This is in contrast to siltstone, silt is a size term used for material that's…

Sometimes there may be a need to build a retaining wall after an asphalt paved surface has been installed. If you’re considering building a retainer wall adjacent to, or top of an existing asphalt surface there are some important things to consider before you begin building the wall. Here is how to make sure you have a sturdy wall that does not compromise your asphalt. Retainer Walls on top of Asphalt vs. Concrete Surfaces Asphalt pavement is a common material used for parking areas and…

by mixing cement, sand, and aggregates with water. Fresh concrete can be moulded into almost any shape, it can also be given different strengths, giving it a significant advantage over other materials. It became very popular after the invention of Portland cement in the 19th century; however, its limited tension resistance initially prevented its wide use in building construction. To overcome poor tensile strength, steel bars are embedded in concrete to form a composite material called…

Sidewalks play a very important role when it comes to the safety and convenient transit of pedestrians. In this document you will learn how to pour and finish concrete into an area that has already been prepared. The dimensions of the slab we will be working with are, 5ft by 5ft by 4in deep. The sidewalk you will be completing will be in a standard neighborhood. It is best to start this task in moderate weather. The bill of materials will consists of bags of Quikrete, wheel barrel, water source,…

Concrete is a building material that looks like stone. The Latin word “concretus” means to grow together. Concrete is a composite material，composed of coarse granular material (the aggregate or filler) entrenched in a solid matrix of material by (the cement or binder) that fills the space between the aggregate particles and pastes them together. Depending on what kind of binder is used, concrete can be divided into nonhydraulic cement concrete (made of nonhydraulic cement), hydraulic cement…

Hydroxyapatite (HA) has been studied for their excellent performances which are suitable for use in bone defects or regeneration of bone. Hydroxyapatite (HA) has poor mechanical properties which make it limited used in a load bearing area. In this case, sodium alginate (SA) was used to be mixed with hydroxyapatite (HA) by using precipitation method to increase the mechanical and physical properties. The mixing of hydroxyapatite/sodium alginate effectively increases the densification and hardness…

Large-scale and industrial construction projects require a unique blend of materials, quite different from those used in home construction. One of these is pre-cast concrete components such as stairways, beams, floors and walls. These elements lend structural integrity, fire safety and insulation benefits. For companies that transport these heavy construction materials, great care must be taken to ensure they arrive at their destination in a timely, safe, and efficient manner. Weight Limits…

http://www.sunriseopals.com Buying Opal Jewellery Opals are intriguing and delightful stones; however it can mistake looking for them. What is the distinction in opal jewellery between stone, doublets, and triplets? Is the smooth light stone more profitable then the dim green? What hues would it be advisable for me to search for? Here are a couple tips while picking opal: • Australian opal is by and large the best and where the greater part of the universes opal supply originates from. This is…