EPOXY INJECTION FOR CONCRETE CRACK REPAIR

Introduction Certain things in life are inevitable. Some are said to in-clude death, taxes, and concrete cracks! The latter is subject to volumes of literature on causes and cures. Some of the more typical causes for concrete cracking include: •         Drying shrinkage; ,•         Thermal contraction or expansion; •         Settlement; •         Lack of appropriate control joints; •         Overload conditions that produce […]

TYPES OF COFFERDAMS

A cofferdam may be defined as a temporary structure that is constructed on a river or a lake or any other water-bearing surface for excluding water from a given site to execute the building operation to be performed on dry surface. The walls of the temporary structure should be practically water tight or at least […]

PLATE LOAD TEST

What is Plate Load Test? Plate load test is done at site to determine the ultimate bearing capacity of soil and settlement of foundation under the loads for clayey and sandy soils. So, plate load test is helpful for the selection and design the foundation. To calculate safe bearing capacity suitable factor of safety is […]

RAFT FOUNDATION HISTORY

n early 70s, P.W.D, designed raft foundation as R.C.C. solid slab.The additional component of cut off walls on both sides U/s and D/s was considered necessary to take care of seepage and possible undermining of the raft due to seepage and the scour due to floods . As the design approach was based on beams […]

TERRACED RETAINING WALLS

One of the purposes of building a retaining wall is to prevent erosion. Soil erosion can be particularly bad on a steep incline, compared to flatter ground. The main culprits of soil erosion in your garden is weathering as a result of wind and rain. If your garden has a steep incline, then you would […]

ACI CONCRETE MIX DESIGN METHOD

ACI recommends a relationship between compressive strength and w/c ratio. Water demands for aggregates sizes are summarised in relation to the concrete workability (consistence) required. This leads to an estimate of cement content and aggregate content from an assumed concrete plastic density. The rodded bulk volume for the course aggregate is estimated from tables giving […]

Detail for designing foundation for steel column footing

A detailed process of building a foundation for steel column footing is presented here, making a good presentation of the designing it all (Designing Foundation for Steel Column Footing). The construction video bellow is showing the details of the processes for developing perfect foundation when the steel column footing needs to be installed. Credits on […]