Experimental evaluation of hot mix asphalt using coal bottom ash as partial filler replacement

• Autorzy: Kamran Muhammad , Khan Muhammad Tariq , Khan Diyar , Mohd Hasan Mohd Rosli , Khan Noman , Ullah Mati

Identyfikatory

DOI

10.7409/rabdim.023.008

Warianty tytułu

PL

Ocena doświadczalna mieszanek mineralno-asfaltowych po częściowym zastąpieniu wypełniacza popiołami dennymi z elektrowni węglowej

• Języki publikacji: EN PL

Abstrakty

EN

The purpose of this study is to evaluate the performance of hot mix asphalt (HMA) prepared with coal bottom ash (CBA) as an alternative mineral filler. In this study, the effect of CBA on rutting, stiffness and fatigue resistance was experimentally evaluated. Combinations of conventional filler (stone dust) with different percentages of CBA (at 1.5%, 3%, and 4.5% by volume) were adopted. The HMA samples were prepared and tested using the Marshall mix design method. Following the Asphalt Institute MS-2 and the Pakistani National Highway Authority (NHA) General Specifications, sixty samples of HMA were compacted; stability tests at varying bitumen contents (3.5%, 4.0%, 4.5%, 5.0%, and 5.5%) were used to determine the optimum bitumen content (OBC) in the mixture for each percentage of CBA in the filler. For 0%, 1.5%, 3%, and 4.5% CBA, the optimum bitumen contents of 4.27%, 4.47%, 4.53%, and 5.0% were obtained, respectively. They were used throughout the study. Three samples with the optimum binder content were made for each of the four analysed CBA proportions. The wheel tracker test was run on 12 OBC samples, and the dynamic modulus test was run on 12 OBC samples. The Marshall stability and flow test results showed that the samples prepared with 3% CBA as filler and an OBC of 4.53% satisfied the NHA requirements for flexible pavement. It was noted that CBA greatly improves the rutting resistance and stiffness of asphalt mixtures. It also improved the fatigue life. Therefore, adding up to 3% CBA by volume to stone dust used as filler in asphalt concrete can minimize the need for stone dust and provide a suitable method of CBA disposal.

PL

Przedstawione badania miały na celu ocenę mieszanek mineralno-asfaltowych (MMA) wykonanych na gorąco i przygotowanych z zastosowaniem popiołów dennych pochodzących ze spalania węgla w roli alternatywnego dodatku do wypełniacza. Zbadano doświadczalnie, jaki wpływ na koleinowanie, sztywność i trwałość zmęczeniową mieszanek ma zawartość popiołów dennych w typowym wypełniaczu. Zastosowano kombinacje konwencjonalnego wypełniacza (mączki kamiennej) z różnymi udziałami w nim popiołu dennego: 1,5%, 3% oraz 4,5% (v/v). Mieszanki zaprojektowano i zbadano wg metody Marshalla. Zgodnie z instrukcją MS-2 Instytutu Asfaltowego oraz specyfikacjami ogólnymi pakistańskiego Zarządu Dróg Krajowych (NHA) zagęszczono sześćdziesiąt próbek mieszanek. Na podstawie oznaczeń stabilności wykonanych przy różnych zawartościach lepiszcza (3,5%, 4,0%, 4,5%, 5,0% i 5,5%) określono optymalny jego udział w przypadku każdej z rozpatrywanych zawartości popiołów dennych w wypełniaczu. Dla zawartości popiołów dennych w wypełniaczu 0%, 1,5%, 3% i 4,5% uzyskano odpowiednio optymalne udziały objętościowe lepiszcza w mieszance: 4,27%, 4,47%, 4,53% oraz 5,0%. Uzyskane w wyniku tej analizy wartości zastosowano następnie we wszystkich dalszych badaniach mieszanek. Dla każdego z czterech rozpatrywanych udziałów popiołu dennego w wypełniaczu przygotowano po trzy próbki mieszanki o optymalnej zawartości lepiszcza. Badanie odkształceń trwałych w koleinomierzu wykonano na 12 próbkach. Również badanie modułu dynamicznego przeprowadzono na 12 próbkach. W oparciu o uzyskane w badaniu metodą Marshalla parametry stabilności i osiadania wykazano, że próbki mieszanek zawierające 3% popiołów dennych w wypełniaczu przy optymalnej zawartości lepiszcza 4,53% spełniały wymogi NHA przeznaczone dla nawierzchni podatnych. Stwierdzono, że dodatek popiołów dennych w wypełniaczu znacznie poprawił odporność mieszanek na koleinowanie oraz ich sztywność. Wpłynął również na wzrost trwałości zmęczeniowej. Dodatek popiołów dennych w ilości do 3% (v/v) w stosunku do mączki kamiennej może zatem zminimalizować jej zużycie jako wypełniacza do mieszanek i jednocześnie zapewnić odpowiednią metodę wykorzystania popiołów pochodzących ze spalania węgla kamiennego.

Słowa kluczowe

EN

durability; fatigue life; industrial by-product; Marshall properties; permanent deformation; waste materials

PL

badanie Marshalla; deformacje trwałe; odpady; przemysłowe produkty uboczne; trwałość nawierzchni; trwałość zmęczeniowa

• Wydawca: Instytut Badawczy Dróg i Mostów
• Czasopismo: Roads and Bridges - Drogi i Mosty
• Rocznik: 2023
• Tom: Vol. 22, no. 2
• Strony: 167--179
• Opis fizyczny: Bibliogr. 43 poz., rys., tab.

Twórcy

autor

Kamran Muhammad

• University of Engineering and Technology, Department of Civil Engineering, Peshawar, Pakistan

autor

Khan Muhammad Tariq

• University of Engineering and Technology, Department of Civil Engineering, Peshawar, Pakistan

• https://orcid.org/0000-0002-7768-4776

autor

Khan Diyar

• Politechnika Śląska, Wydział Transportu i Inżynierii Lotniczej, Studia doktoranckie, ul. Krasińskiego 8., 40-019 Katowice

• https://orcid.org/0000-0002-5810-9012

autor

Mohd Hasan Mohd Rosli

• University Sains Malaysia (Engineering Campus), School of Civil Engineering,.14300 Nibong Tebal, Penang, Malezja

• https://orcid.org/0000-0001-6922-4158

autor

Khan Noman

• Sarhad University of Science and Information Technology Ring Road Campus, Department of Civil Engineering, Peshawar, KPK, Pakistan

• https://orcid.org/0009-0007-3931-7119

autor

Ullah Mati

• University of Engineering and Technology, Department of Civil Engineering, Taxila, Punjab, Pakistan

• https://orcid.org/0000-0002-7212-8826

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