Expansion Joint Sealant Treatment In Bangladesh

Expansion joint sealant may be a term accustomed describe a gaggle of weatherproofing merchandise supposed to be used as aesthetic or purposeful waterproofing agents in gaps in concrete slabs, walk ways, decks, bridges, and sidewalks. enlargement joint sealer materials area unit chosen for his or her ability to soak up impact and expand or contract together with the remainder of the structure while not cracking or separating. These waterproofing agents embrace many kinds of fluid or gel epoxies and solid cork or wood strips. betting on the enlargement joint sort, these sealants is also used with or while not a backing material.

Expansion joints Sealant area unit usually joints or areas left between slabs or construction components of an equivalent material to facilitate growth and contraction thanks to changes in close temperatures. Though they serve their supposed purpose well, they gift many aesthetic and sensible dilemmas. For instance, they have a tendency to be visually unattractive and permit wetness to flow into or beneath the structure. Additionally, they’re disreputable traps for dirt and dirt, and permit grass or weeds to grow through the structure. All of those problems could also be self-addressed by inserting a sealer into the joint gap.

What is an expansion joint Sealant?

An enlargement joint may be a created joint between 2 sections of a concrete floor block, that gets narrower once the panels of the block expand, thanks to a rise in close temperature (imagine an out of doors hard-standing within the heat of summer). This is completely different from a contraction joint (or ‘control joint’), that opens and gets wider because the concrete contracts whereas activity. The terms ‘expansion’ and ‘contraction’ thus ask the movement of the concrete, instead of the movement of the joint. However, the term ‘expansion joint sealant’ is typically employed in each eventuality – most likely as a result of the concrete that expands once it gets heat conjointly contracts once it cools. The principles of protection the joint square measure similar in each cases. Joints square measure typically a metal joint (armored joint) designed into the ground throughout the concrete pour; or a saw-cut joint (induced joint) turn over the finished floor.

Types of Expansion Joint Sealant Solution

In construction, the two most common types of sealants are use in Bangladesh:

Polyurethane Based Joint Sealant
Polysulfide Joint Sealant

Features / Advantages

Cures at ambient temperatures to a tough, elastic and flexible rubber like material
 Bonds strongly to most of the building materials with the use of recommended primers
 Durable, remains unaffected by UV rays, ozone and weathering conditions
 Resistant to water, salt water, 10% dil. acids except nitric acids, alkalis, most of the common chemicals, vegetable, lubricating oils and fuels
 Performs well in a temperature ranging from –20⁰C to 80⁰C
 Slip resistant (sag) can be applied in horizontal joints
 Movement capability – Provides satisfactory hermetic sealing of the joint subjected to expansion, contraction, vibration and cyclic movement within the following limits. -Movement joints up to ± 25% of the width
 Slip resistant (non-sag) can be applied in vertical & ceiling g joints
 Self leveling, after pouring in horizontal joint levels itself
 Resilient. Recovers the original width after expansion & contraction without loosing the surface bond
 Excellent reparability property
 It can be over coated by waterproofing compounds
 Non-toxic
 Sealant will not cause staining to concrete masonry or stones