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Practical Recommendations for Construction of Longitudinal Joints in Hot Mix Asphalt (HMA) Pavements

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Practical Recommendations for Construction of Longitudinal Joints in Hot Mix Asphalt (HMA) Pavements

Rajib B. Mallick, Distinguished Professor of the Ralph White Family, Civil and Environmental Engineering, Worcester Polytechnic Institute (WPI), Massachusetts, USA, Veeraragavan Amirthalingam, Professor of Civil Engineering, IIT Madras Hot mix asphalt (HMA) is mainly composed of mineral aggregate and asphalt binder.

They are heated and mixed at high temperature (~150oC) in the factory, and placed together with the paver at a low but sufficiently high temperature (~140oC) ), and before the temperature drops below a certain level (usually 90-100oC) with roller compaction. Due to the increased stiffness, once the temperature of the mixture drops below about 90oC, compaction usually becomes very difficult.

This change in stiffness is the result of the change in the stiffness of the asphalt binder, which behaves as a viscous material at high temperatures and as a viscoelastic material in most other temperature ranges. The carefully designed and constructed HMA pavement provides a durable, smooth and waterproof surface at a relatively low cost. HMA (also known as asphalt) pavements do not need to create joints like ordinary Portland cement concrete (PCC) pavements.

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However, unless trapezoidal paving is used, longitudinal seams will appear between adjacent paving lanes. During the first pass of the paver, the first lane is constructed. When placing adjacent channels, the first channel is already cooled and is called the cold side of the joint.

The second channel is often referred to as the hot side of the joint. During the compaction of the cold lane edge, the road surface is not constrained, so the density near the edge is lower (higher clearance) compared to the area far from the edge. There is a restriction when compacting the edge (hot side) of the adjacent lane because it is placed next to the cold seam. Due to problems at the joint and on both sides of the joint, the density directly in the joint is almost always lower than that of the asphalt mixture away from the joint.

The low-density joint area is the “Achilles’ heel” of other well-structured pavements because it may allow water and debris to enter the pavement quickly and may cause subsequent disintegration and premature damage

News Source : NBM&CW

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Akshay Kumar wishes director Priyadarshan on birthday with Bhooth Bangla BTS pic: ‘Surrounded by ghosts…

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Akshay Kumar wishes director Priyadarshan on birthday with Bhooth Bangla BTS pic: ‘Surrounded by ghosts…

Akshay Kumar and Priyadarshan, the acclaimed Indian director, celebrated their 68th birthday on Instagram. Kumar, who has worked with Priyadarshan on several cult comedies of the early 2000s, wished him a happy birthday and called him a mentor. The duo is now back together for their upcoming horror-comedy, Bhooth Bangla.

The first poster of the movie has been released, and it is expected to hit theaters in 2025. Akshay Kumar wore a black fedora and a green jacket, layered over a black tee, and fans have expressed their excitement for their new movie.

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The duo’s dynamic and deep bonding have been praised by fans, who have expressed high anticipation for their new movie. The first poster of Bhooth Bangla has already been released, and the movie is expected to hit theaters in 2025.

Akshay Kumar, the versatile Bollywood actor, recently celebrated director Priyadarshan’s birthday by sharing a behind-the-scenes (BTS) photograph from their upcoming film, “Bhooth Bangla.” In the image, Akshay humorously captioned, “Surrounded by ghosts…” The photo features Akshay alongside Priyadarshan and co-actor Paresh Rawal, all dressed in traditional attire, with a black cat perched on Akshay’s shoulder, adding a whimsical touch to the scene.

Reunion After 14 Years

This collaboration marks a significant reunion between Akshay Kumar and Priyadarshan, who last worked together on the film “Bhool Bhulaiyaa” in 2007. Their partnership has been celebrated in the past for delivering successful comedies like “Hera Pheri” and “Garam Masala.” Fans have eagerly anticipated their return to the big screen together, and “Bhooth Bangla” promises to be a delightful addition to their repertoire.

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About ‘Bhooth Bangla’

“Bhooth Bangla” is a horror-comedy that blends elements of suspense with humor, a genre in which both Akshay Kumar and Priyadarshan have excelled. The film is produced by Balaji Telefilms Ltd in association with Cape of Good Films. The motion poster released earlier this year features Akshay Kumar in a suit, with a cat on his shoulder, licking milk slyly, setting the tone for the film’s intriguing and humorous premise.

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Anticipation and Fan Reactions

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The BTS photo shared by Akshay Kumar has generated excitement among fans, who are eager to see the trio back together on screen. The playful caption and the presence of the black cat suggest that “Bhooth Bangla” will offer a mix of thrills and laughs, staying true to the successful formula of their previous collaborations.

As the release date for “Bhooth Bangla be a significant highlight in the upcoming entertainment lineup. The reunion of Akshay Kumar, Priyadarshan, and Paresh Rawal, combined with the intriguing premise and the playful BTS moments, has set high expectations among audiences. Fans can look forward to a cinematic experience that promises both chills and chuckles.

For a visual glimpse into the making of “Bhooth Bangla,” you can watch the following video Akshay Kumar expressed his gratitude as they once again united for their upcoming movie Bhooth Bangla. This marks a new chapter in their long-standing collaboration since the 2000s. He shared a picture from behind the scenes of their new movie, where it seems like they are laughing about something.

Akshay wrote,”Happy Birthday, Priyan Sir! What better way to celebrate than by spending the day on a haunted set, surrounded by ghosts…both real and unpaid extras? Thank you for being a mentor, and the only person who can make chaos look like a masterpiece. May your day be filled with fewer retakes. Wishing you a fantastic year ahead!”

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