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The difference between contraction joint and construction joint?
A construction joint in concrete jobs is a joint where a fully set and hard concrete joins a fresh concrete to make a joint. Normally, cracks would occur at this joint because concrete was not cast monolithic. A contraction joint is joint between two concrete edges so formed which allows minute movement between the two edges caused by heat or some other external forces. Usually, contraction joints are also referred to as expansion joints.
Is cracking at joints acceptable after new pour of concrete?
Cracking at expansion joints is always acceptable and is the reason for the joint itself. There are two kinds of cracks, pretty ones and ugly ones! Ugly ones are random cracks where the concrete relieves itself from drying shrinkage in a random location within the slab of concrete which is normally not appealing to the eye. Expansion joints are placed at predetermined intervals within the slab where random cracks are weakened planes in locations where cracking is predicted prior to fresh concrete placement. All concrete shrinks when it dries, the larger the slab, the greater the overall shrinkage. When the tensile strength of drying shrinkage exceeds the tensile strength of the concrete, cracking will occur. Lets just hopes it cracks in a spot where we planned it instead of a location where didn't. By the way, joints should be cut at least 25% of the depth of the slab.
What can be the cause and cure of water seeping up through the wooden joints of a new concrete driveway and this is not occurring at any other driveway in our community?
If you have laid a foundation fairly deep and haven't 'dialed b4 you dig" you might have hit a pipe, if not try removing the joins and finding the source of the problem once the concrete has dried
How many meter expansion joint is given in building construction?
i live in an apertment block it is 150 meters long it has an underground garage.a ground floor a first and second floor.it steps down .as it is going down a hill .how many vertical expansion joints should be in it.it is constructed with re-enforced pillars block work then rendered
Do you have a drawing for a 8' high block wall using 8x8x16 block with concrete foundation?
I can't provide a specific drawing, but I can describe a basic design for an 8' high block wall using 8x8x16 blocks. The wall should have a concrete foundation that is at least 12 inches wide and 6 inches deep, with rebar for reinforcement. The blocks can be stacked with staggered joints for added stability, and it's essential to consider drainage and weep holes to prevent water buildup. Always consult local building codes and a structural engineer for precise specifications and safety considerations.
Why construction joints are provided?
what are construction joints and movement joints
How make a construction joint?
how construction joints is done?
Where to leave construction joints in RCC slab?
construction joints are leave in RCC Slab one third of span.
Construction joints on walls?
water stop
What has the author Billy D Neeley written?
Billy D. Neeley has written: 'Methods of preparing horizontal construction joints in mass concrete' -- subject(s): Joints, Joints (Engineering), Concrete construction
What is the minimum spacing of construction joints in slabs?
18
What are the two types of joints in construction?
Expansion joints. Butt,lap,half-housed,mortise/tenon and mitre joints to name some common ones.
What are the different types of mortar joints used in construction?
The different types of mortar joints used in construction include concave, V-shaped, flush, weathered, and raked joints. Each type serves a specific purpose in providing strength and aesthetics to the structure.
Does popcorn make you retain water?
construction joints in water retaining structure?
Which type of load transfer device is uised for expansion or construction joints?
dowels
Where is construction joints in column?
To avoid reinforcement lapping zone and spliceing zone
Which type of load transfer devices are used for expansion or construction joints?
smooth dowels
