Concrete

of this study was to apply Piaget’s Concrete Stage in cognitive development in learning science and to compare the results of urban and rural students in academic achievements. The researchers gave a hypothesis that there were no differences in the concrete operational stage of rural and urban students’ ability in solving the problems of Chemistry, Biology, and Physics in learning general science. Data was collected to review the application of Piaget’s Concrete Stage and the comparison of urban…

of the dam or axis of the dam. 4.3 Cross-section of Gravity Concrete Dam  For any suitable conditions, gravity dam may be constructed to greater heights. Grand Dixence dam in Switzerland is highest concrete gravity dam and its height is 284 m and highest concrete gravity dam in India is a Bhakra dam with a height of 226m.  In such structure, the ratio of base width to height is less than 1.1. Fig. shows a typical cross-section of concrete dam (Gravity).  To release the uplift pressure, a…

FRACTURE MECHANICS Failure can occur due to various reasons: Uncertainties in loading or environment Defects in material Inadequacy in design Deficiency in construction or maintenance The strength of materials can be increased significantly. But sometimes this comes at the cost of reduced ductility of the material. For example, strength of steel can be increased by manipulating the microstructure. But this increases the brittleness of the material. Thus, a member can fail catastrophically…

There are 2 types of strengths that materials can be tested on: Comprehensive strength and Ultimate Tensile strength. Ultimate Tensile strength is measured by how much stress can a material withstand, while being stretched or pulled apart before breaking, while comprehensive strength is how much van the material resists while being pushed in (together). There is also a Yield Strength- the point at which the material starts to slowly break and cannot come back to it’s shape. Before the yield…

Plywoods are sheets of thin wood stuck on top of each other. These sheets are alluded to as wood finishes. These layers when assembled deliver an exceptionally solid and strong wood material known as plywood. The sorts of cement used to stick the thin sheets of wood together is a main consideration in making quality bits of plywood. At the point when a solid and enduring cement is utilized, plywoods turn out to be greatly improved than plain woods in opposing breaks, contracting, curves and…

When heat is applied to an object, that object usually undergoes a structural change. This also applies to rock. Since Knife River Flint is a fine-grained stone the changes predictably would be minor, compared to a coarse-gained stone that would exhibit greater change when it came to thermal altering. Ahler purposed “that fine-grained cherts respond to heat alteration at lower temperatures than do coarse-grained cherts” (Ahler 1983: 2) which Knife River Flint is a fine-grained chert, so it…

Whether you're paving a driveway, a parking lot, or a road, you have a few different options to choose from. Asphalt overlay and asphalt removal each have their own advantages, and the type that suits you best will really come down to the current state of the pavement. Double Diamond Contracting of Kalispell, MT, will handle all types of asphalt resurfacing with special attention to detail, which is why they've been the most trusted contractor in the Flathead Valley for over 15 years. With…

Properties of cold formed steel In general, cold formed steel has many important properties which make it significant building material, the main two properties of cold formed steel are: the yield point and the tensile strength and how are they related to formability of steel, most members in building industry are on high tensile loads, cold formed steel has a Huge tensile strength, however the ratio between the tensile strength and the yield strength is 1.2-1.8 .in addition to other good…

With the assignment of this Truss Bridge project, our primary objective was to design a sturdy bridge, with the durability to withstand the heaviest load over an allotted time span using limited materials, yet cost efficient. To participate and qualify in this project, we must comprehend the guidelines and statutes to avoid disqualification. The criteria and constraints will contain specific and precise measurements of a length, width, and height pertaining to either the roadbed or bridge.…

You can lay concrete during the winter; however, you need to be careful. Here are a few precautions that you need to take while laying concrete during cold weather. #1 Never Lay Concrete On Frozen Ground The key to laying concrete during the winter time is to never lay it when the ground is frozen or on top of snow or ice. When you lay concrete on frozen ground, the coldness will transfer to the concrete and will slow down the drying process. Additionally, when the ground thaws, it will…