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How to make sure that the Submersible boring is a success ?
Before planning to put bore observe surrounding sites / area bore well points
1 . Gather information on successful and failure bore well points near your site
2 . If successful how much water neighbor got , How much depth each bore well went
3 . For each bore well point how much depth casing they used .
All above point will help you in analyzing your decision on bore well digging and cost
Why concrete barriers have curved surface profiles ?
The concrete safety fencings are made to contain vehicles in their carriageway being travelled so as to reduce the chances of rebounding into the roads leading to more hazards . In the case of normal fencings upon vehicle crashes the fencings give away so as to absorb as much energy as possible henceforth reducing the impact on the vehicles . But in the case of concrete barriers their purpose is not to absorb energy of vehicles crashing into the barrier but to retain them . They have a curved design so as to allow the vehicles that hit them to slightly go up on the barrier but not overturn . They also prevent the vehicle from again getting back on the road by rebounds . This helps in vastly reducing the chances of other vehicle hazards .
Even after having cuts at the pillar and wall joint , cracks have developed . How to avoid it ?
Cracks develop due to the difference in expansion value of concrete to the masonry . Masonry expands more than concrete and this result in cracks .
Where ever there is a pillar and wall joint , fix mesh for those joints so that plastering will not give cracks . This activity need to be completed before start of plastering . Same point applies for beams also .
Why should curing not be done by ponding and polythene sheets ?
The primary purpose of curing is to reduce the heat loss of concrete that is freshly placed to the atmosphere and in order to reduce the temperature gradient across the cross-section of the concrete . Ponding is not preferred for curing as this method of thermal curing is greatly affected by cold winds . In addition to that in ponding large amounts of water is used and has to be disposed off from the construction sites . Polythene sheets are used on the basis that it creates an airtight environment around the concrete surface henceforth reducing the chances of evaporation over fresh concrete surfaces . But the usage of polythene can be a drawback as it can be easily blown away by winds and also the water lost by selfdesiccation cannot be replenished .
What factors should be considered before buying an excavator for my project ?
Excavators perform a number of important tasks during the construction process , including digging , lifting , transferring materials , demolition , and grading . In this sense , they are indispensable pieces of equipment . The most important guideline is to keep the nature of one ' s projects in mind , and to look for a machine that can best perform that kind of work . Factors include excavator size , type , attachments , and any added features . The excavator should be versatile , easy-to-use , durable , and reliable . Understanding the various sizes , types , optional features , and specifications helps buyers narrow down their choices . If buying a second hand equipment , make sure the condition is acceptable .