The temperature of the mix approximately 10 feet (3.04 m) behind the paver shows 105 degrees C (221 degrees F).
Astec’s Double Barrel® plant with warm mix system has become the most used warm-mix asphalt technology in the Republic of Kazakhstan.
The Astec Double Barrel® plant with warm mix system continues to be enthusiastically accepted by customers throughout CIS (Commonwealth of Independent States) countries. With the Almaty (Kazakhstan) contractor TOO Zhol providing good feedback, the warm mix system has become the leading method of producing warm-mix asphalt (WMA) across all the technologies that are available and have been tested in Kazakhstan. Since the start of the 2016 paving season, WMA has been successfully produced with the Astec warm mix system at four production sites across the country (Astana, Almaty, Shymkent, and Petropavlovsk) with an estimated 300,000 tonnes (330,694 tons) produced and paved for various customers—from republic-level highways to regional and municipal roads, and with various mix designs involved—from wearing course to binder to base course mixes.
Astec Plant Commissioned
Kakhramon Ishmuradov, head of production for TOO Zhol, manages production at two HMA plants (Ammann and Kredmash) near Kaskelen in the Almaty region: “OptimusVia, the Astec representative in Kazakhstan, commissioned the Astec Double Barrel® plant with warm mix system for our Kredmash plant in the beginning of August 2016. The equipment was shipped within four weeks after the contract was done, and commissioning took three working days, including test production runs. In the first weeks, we produced several thousand tons of SMA-20 for our paving crew located in the Uzhtobe district, some 370 km (229 mi) away from the production site. The distance of the road project combined with the stone-mastic asphalt mix for paving the wearing course was the primary reason we decided to move to Astec’s technology.”
Ishmuradov continued: “The warm mix system performed to Astec’s promises and met our expectations. With production temperatures as low as 135-140 degrees C (275-284 degrees F), paving crew members have been reporting excellent workability of the mix, even at temperatures below 100 degrees C (212 degrees F), after many hauling hours. There were no issues in terms of mat compaction or warm SMA-20 characteristics.”
The mix has been tested by an independent laboratory both at the production facility and the paving site. Test results have shown good consistency and compliance of mixes to both mix design projected properties and Kazakhstani standards for HMA mixes.
Zhol has also produced warm standard wearing course mix (type B fine-graded mix) and tested samples at 0, 20, and 50 degrees C (32, 68, and 122 degrees F). All tests have shown great mix performance.
Strong Support of Astec
Astec is now discussing manufacturing a second Double Barrel® plant with warm mix system for TOO Zhol upon request of the company owner, Sergei Geidarov. He was pleased with the technology and the level of attention and devotion he observed on the part of the TOO OptimusVia commissioning and service team. All technical, training, and other issues were promptly and professionally addressed by Sergei Nikolayev and Konstantin Gorokhov from OptimusVia. Sergei Geidarov shared that strong local support of the Astec products made him feel secure about working with the most technologically advanced equipment Astec has to offer.
Warm-mix asphalt produced at the plant is 140 degrees C (284 degrees F).
Kakhramon Ishmuradov, head of production for TOO Zhol, shown at the Kredmash plant.
Letters indicate that warm-mix asphalt produced with the Astec Double Barrel® plant with warm mix system performs well and is in compliance with the HMA standards of Kazakhstan.