Compressive strength

As can be seen, multicem concrete showed resistance below the limit for structural lightweight concrete, which can be classified so as insulating concretes or moderate resistance. However, according to Radonjanin, Malesev, Marinkovic and Al Malty (2013), concrete made from 100% recycled coarse aggregate can achieve high compressive strength since large amount of cement to be added, which is therefore not an economical proposition. Still according to the author, concrete made with 50% or 100% of recycled coarse aggregates requires a reduction of 4% to 10% of the ratio a / c of 5% to 10% more cement than the conventional concrete to give it same compressive strength at 28 days of conventional concrete. For the lightweight concrete produced, the…

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…

dependence of compressive strength on water content of ternary systems. As w/s decreases, total water content in the mix decreases and results in increased strength, except two mixes in series 4 (S4.30 and S4.40). These two mixes include very high filler content at 30-40% in which the decrease of water content might not compensate the strength loss due to the reduction of cementitious materials (MgO + SF). From this figure, the effective range of w/s to achieve the highest strength is found in…

lowest 28-day compressive strength of 43.7 MPa. The introduction of filler content, as at only 10%, is able to reduce water content dramatically to w/b=0.27, leads to the impressive improvement of compressive strength to 85 MPa. Further increase of filler content to 40% results in higher reduction of water content to as low as w/b=0.21 with only a marginal increase of compressive strength to 87 MPa. Testing results have shown that ternary M-S-H binder systems of MgO-SF-QF have higher compressive…

1. The concrete mix proportions for the batch were calculated before the beginning of the lab by a select few group members. Calculations were done with goal of the having the greatest early strength as reasonably possible. To accomplish this, the accelerator agent of calcium chloride was added at a proportion of 2 Ib. of calcium chloride to every 100 Ib. of cementitious material. This ended up being 0.483 Ib. of accelerator. The physical properties, like specific gravity and percent absorption,…

Laboratory Report 2: Soil Texture, Bulk density and Porosity Introduction Soil Texture The classification of soil texture is determined by the percentage of each of the soil separates. Soil separates are mineral particles smaller than 2mm, and these particles are sand, silt and clay. These textures are separated by the size of the particles, with sand being the largest between 2mm and 0.05mm, silt at between 0.05mm and 0.002mm, and clay at <0.002mm. The size of the particles influences the…

Chapter 3: Tests and Implementation. The self compacting geopolymer concrete should possess following properties: 1. Flow ability: It is the property of fresh concrete mix to flow and fully fill complex formwork under an action of its self weight. Slump flow test is performed to check flow ability of concrete. 2. Viscosity: It is the property of concrete to resist flow at a glance when it started. Low viscosity concrete will flow quickly but for a short duration while high viscosity concrete…

Key Design Drivers The following were the key design drivers for the lower and middle completion string: • Desire not rotate SAS completion string if possible, configuration was set-up with the ability to rotate to bottom (swivel system utilized as contingency) but not as primary method of installation. Note: all previous Husky wells have been installed without rotation • Offset well friction data and the as-drilled 216mm open hole friction factors used to provide accurate T&D analysis prior to…

A concrete patio or entryway is a standard on most homes in Texas. Owners don’t typically even acknowledge that they can transform this feature of their home although it’s typically the first thing a visitor sees. A concrete overlay is a cost efficient way to add style and a modern touch to the front of a home to boost its curb appeal. A concrete overlay is an ideal way to transform any concrete feature that needs a little style. A front porch or entryway is typically just plain concrete with a…

Construction of the Concrete Roof of the Assembly Hall The University of Illinois- Urbana Champaign Assembly Hall has been the home of the Illini men’s basketball team for over half a century and has been one of the greatest engineering and architectural feats on campus ever since its creation over half a century ago. Beginning on May 25, 1959, construction of the Assembly Hall was carried out by structural engineers Othmar Ammann and Charles Whitney, general contractor Felmley-Dickerson Co.,…