Studi Penggunaan Batu Kapur Kalipucang sebagai Substitusi Sebagian Agregat Halus Beton Aspal Jenis AC-BC (Hal. 45-55)

2018 ◽  
Vol 4 (1) ◽  
pp. 45
Author(s):  
Lucky Budiman ◽  
Silvia Sukirman
Keyword(s):  
Data Analysis ◽  
Calcium Carbonate ◽  
Asphalt Concrete ◽  
Sedimentary Rock ◽  
Traffic Load ◽  
Volumetric Properties ◽  
Fine Aggregate ◽  
The Stability

ABSTRAKPerkerasan jalan adalah campuran antara agregat dan bahan pengikat, berfungsi melayani beban lalu lintas. Agregat yang biasa digunakan untuk perkerasan jalan adalah batu pecah dan bahan lainnya. Batu kapur adalah batuan sedimen yang terusun dari kalsium karbonat (CaCO3) dalam bentuk mineral kalsit. Batu kapur merupakan salah satu mineral industri yang banyak digunakan oleh sektor industri dan konstruksi. Tujuan penelitian ini antara lain untuk mengetahui karakteristik batu kapur dan penggunaan batu kapur Kalipucang sebagai substitusi agregat halus dari campuran beton aspal jenis AC-BC, dengan penambahan batu kapur sebanyak 50% dari dari agregat halus. Berdasarkan hasil analisis data pengujian didapatkan nilai stabilitas dari beton aspal substitusi batu batu kapur lebih tinggi dibandingan dengan campuran beton aspal tanpa batu kapur, yaitu 1.800 kg untuk campuran substitusi batu kapur dan 1.600 kg untuk campuran tanpa batu kapur. Sifat volumetrik beton aspal dari kedua campuran yaitu    dan  memenuhi spesifikasi yang telah ditentukan.Kata kunci: laston AC-BC, batu kapur, substitusiABSTRACTThe pavement street is a mixture between of aggregates and binders,the function is serving the traffic load. The aggregate commonly used for street pavement are broken stone and other materials. Limestone is sedimentary rock are composed of calcium carbonate (caCO3) in the mineral form of calcite.Limestone is one of a mineral an industry that is much used by the industrial and construction sectors. The purpose of this research include to know characteristic limestone and the use of limestone Kalipucang as a substitution of fine aggregate from a mixture of asphalt concrete of AC-BC,by the addition of limestone 50% of the fine aggregate. Based on the results of data analysis testing obtained the value of the stability from concrete asphalt  the substitution of limestone higher than being with a mixture of asphalt concrete without limestone, that is 1,800 kg to mixed the substitution of limestone and 1,600 kg to mix without limestone. Volumetric properties of asphalt concrete of two mixetures is    and meet specifications which has been determined.Keywords: laston AC-BC, limestone, substitution

scholarly journals PENELITIAN CAMPURAN ASPAL BETON DENGAN MENGGUNAKAN FILLER AMPAS TAHU

2020 ◽  
Vol 3 (1) ◽  
pp. 130
Author(s):  
Dony Triyatno ◽  
Yosef Cahyo ◽  
Ahmad Ridwan
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Concrete Mixture ◽  
Optimum Level ◽  
Fine Aggregate ◽  
River Sand ◽  
Average Value ◽  
Asphalt Content ◽  
The Stability

Road construction in Indonesia mostly uses concrete asphalt. This study aims to determine the optimum level of asphalt produced in a concrete asphalt mixture with tofu pulp filler, in terms of the stability of Marshall, flow, VIM, VMA, VFB, and MQ. Asphalt concrete mixture in this study uses AC 60/70 asphalt. This study uses 5 samples, each using a different asphalt content, namely: 5%, 5.5%, 6%, 6.5%, 7%, with one sample consisting of 3 variants.  The material used is a coarse coral aggregate held by sieve No. 8 (2,36mm). Fine aggregate with Brantas river sand passes filter no.8 (2.36mm), and fillers use tahas pulp bypassing filter no. 200 (0.075mm). The results of this study on Marshall characteristics obtained asphalt content of 5% and 6% with the average value of stability 712 and 881, Flow 3.3 mm and 2.4 mm, VIM 4.65% and 4.24% VMA 19.29% and 17.87%, VFB values of 75.41% and 76.15%, and MQ 271 kg / mm and 433kg / mm.Pembuatan konstruksi jalan di Indonesia banyak menggunakan aspal beton. Penelitian ini bertujuan untuk mengetahui kadar aspal optimum yang dihasilkan pada campuran aspal beton dengan filler ampas tahu, ditinjau dari stabilitas Marshall, flow, VIM, VMA, VFB, dan MQ. Campuran aspal beton dalam penelitian ini menggunakan aspal minyak AC 60/70. Penelitian ini menggunakan 5 sampel, masing-masing menggunakan kadar aspal yang berbeda yaitu: 5%, 5,5%, 6%, 6,5%, 7%, dengan satu sampel terdiri dari 3 varian. Tahapan penelitian yaitu agregat kasar batu koral tertahan saringan no. 8 (2,36mm), agregat halus dengan pasir sungai brantas lolos saringan no.8 (2,36mm), dan filler menggunakan ampas tahus dengan lolos saringan no. 200 (0,075mm). Hasil dari penelitian ini pada karakteristik Marshall didapat kadar aspal otimum 5% dan 6% dengan nilai rerata stabilitas 712 dan 881, Flow 3,3 mmdan 2,4 mm, VIM 4,65% dan 4,24% VMA 19,29% dan 17,87%, nilai VFB 75,41% dan 76,15%, dan MQ 271 kg/mm dan 433kg/mm.

scholarly journals PENGARUH SUBSTITUSI AGREGAT HALUS SABANG TERHADAP KINERJA LASTON LAPIS AUS (AC-WC)

2018 ◽  
Vol 1 (4) ◽  
pp. 89-98
Author(s):  
Mohd Fahmi Abdya P. ◽  
Sofyan M. Saleh ◽  
Yusria Darma
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Initial Step ◽  
Concrete Mixture ◽  
Fine Aggregate ◽  
Aceh Province ◽  
Asphalt Content ◽  
On The Road ◽  
The Stability

Asphalt and Aggregate is the main ingredient of the asphalt concrete layer which determines the quality of asphalt pavement. One of the main cause of the damage and decrease of asphalt pavement strength on the road is the low strength and durability of the asphalt mixture. . But in the other side the utilization of local materials is expected to be used maximally to improve efficiency in terms of financing, especially for island area such as Sabang city of Aceh Province. Importing material from Ace Besar district is need a big cost. In solving this problem therefore it is necessary to maximize the use of local material. this research is done for find out the effect of the use of fine aggregate on the characteristics of the coarse layer of asphalt concrete mixture characteristics (AC-WC)with the addition of Sabang fine aggregate starting from 0%, 25%, 50%, 75% and 100%. The initial step in this research is find the value of optimum asphalt content (KAO).The result of this research shows that the more composition of the Sabang fine aggregate then the decreasing the stability value. The highest stability value is on the asphalt concrete mixture without Sabang fine aggregate substitution with the asphalt content is 5,38% with the amount of 1.658,73 kg and the lowest stability value is on the asphalt concrete mixture with 100% of Sabang fine aggregate substitution with asphalt content is 6,35% in the amount of 979,35 kg. The maximum composition of sabang fine aggregate which pass the requirement specification of Asphalt concrete AC-WC volumetric characteristic is 50% on the level of 5,87% with the stability value is 1.225,81 kg.

scholarly journals The Influence of Limestone And Calcium Hydroxide Addition in Asphalt Concrete Mixture

2016 ◽  
Vol 7 (2) ◽  
pp. 83
Author(s):  
Gunaran Danny ◽  
Nasus K. Y. ◽  
Josep P. F Napitupulu ◽  
Amelia Makmur
Keyword(s):  
Calcium Hydroxide ◽  
Asphalt Concrete ◽  
Sedimentary Rock ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
Maximum Condition ◽  
Characteristic Value ◽  
Heat State ◽  
Flood Damages ◽  
Flood Condition

As time passes, flood often occurs in the area of Gunung Sahari, Jakarta Utara. The flood damages concrete asphalt mixture and it needs particular improvement. Therefore, the purpose of this research is to know the effects of the added combination of limestone and calcium hydroxide on concrete asphalt mixture as a filler resistant to flood. Concrete asphalt mixture that filled with the combination of limestone and calcium hydroxide is a mixture that is made with non-uniform aggregat gradations, filler and liquid asphalt mixed and solidified in a heat state. Limestone and calcium hydroxide mixture is used because both materials included in the most numerous sedimentary rock. Concrete asphalt mixture with the filler combination of limestone and calciumhydroxide is made with optimum asphalt 5.4%, one variation level of limestone (15%), and calcium hydroxide (15%), and three variation levels of fillers (5%, 7.5%, and 15%) to get optimum asphalt levels and filler levels that are compatible with flood condition. Based on optimum asphalt 5.4% towards aggregate total weight and combined level of limestone and calcium hydroxide suitable for the conditions, 8.75 % towards fine aggregate weight. The characteristic value of limestone and calcium hydroxide mixture in maximum condition is VIM 4.55%, VMA 18.83%, stability 1031.26 kg and flow 4.93 mm, where the characteristic value meets the established specifications standard by Pekerjaan Umum Bina Marga. From the result, it is showed that the use of the mixture can decrease the value of stability and increase the value of flow, compared with asphalt and filler with normal levels.

Analysis of Coal Waste Solidification as an Alternative Filler Material in Asphalt Concrete Mixture

2016 ◽  
Vol 841 ◽  
pp. 65-71 ◽  
Author(s):  
Ervina Ahyudanari ◽  
Januarti Jaya Ekaputri ◽  
Mikhael Tardas
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Melting Rate ◽  
Traffic Load ◽  
Concrete Mixture ◽  
Filler Material ◽  
Coal Waste ◽  
The Stability ◽  
The One ◽  
High Level

The purpose of this research is to observe the strength of asphalt concrete using solidified coal waste or geopolymer. The use of geopolymer is known in enhancing concrete mixture strength. More detail in this study is to acquire the comparison rate of stability and flow of mixture using geopolymer and the one with ordinary filler. The stability and melting rate of this mixture will determine whether the use of geopolymer as a filler material in flexible pavement is applicable. In this research, the first stage is to find the initial mix design, which is not including the geopolymer filler. From this research, it is found that the use of geopolymer increases the stability in asphalt mixture but reduce the melting rate and increase the cavity in the mixture. Although the melting rate decreases and the voids increases, the result acquired still fulfills the minimum specification of asphalt concrete for the high level of traffic load.

Predictive Artificial Neural Network Laboratory Fatigue Endurance Limit Model for Asphalt Concrete Pavements Based on the Volumetric Properties and Loading Conditions

2021 ◽  
pp. 036119812199965
Author(s):  
Mayzan M. Isied ◽  
Mena I. Souliman ◽  
Waleed A. Zeiada ◽  
Nitish R. Bastola
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Asphalt Concrete ◽  
Endurance Limit ◽  
Volumetric Properties ◽  
Void Content ◽  
Loading Conditions ◽  
Ann Model ◽  
Artificial Neural ◽  
Fatigue Endurance

Asphalt concrete healing is one of the important concepts related to flexible pavement structures. Fatigue endurance limit (FEL) is defined as the strain limit under which no damage will be accumulated in the pavement and is directly related to asphalt healing. Pavement section designed to handle a strain value equivalent to the endurance limit (EL) strain will be considered as a perpetual pavement. All four-point bending beam fatigue testing results from the NCHRP 944-A project were extracted and utilized in the development of artificial neural network (ANN) EL strain predictive model based on mixture volumetric properties and loading conditions. ANN model architecture, as well as the prediction process of the EL strain utilizing the generated model, were presented and explained. Furthermore, a stand-alone equation that predicts the EL strain value was extracted from the developed ANN model utilizing the eclectic approach. Moreover, the EL strain value was predicted utilizing the new equation and compared with the EL strain value predicted by other prediction models available in literature. A total of 705 beam fatigue lab test data points were utilized in model training and evaluation at ratios of 70%, 15%, and 15% for training, testing, and validation, respectively. The developed model is capable of predicting the EL strain value as a function of binder grade, temperature, air void content, asphalt content, SR, failure cycles number, and rest period. The reliability of the developed stand-alone equation and the ANN model was presented by reasonable coefficient of determination (R2) value and significance value (F).

scholarly journals Financial Hegemony, Diversification Strategies and the Firm Value of Top 30 FTSE Companies in Malaysia

2016 ◽  
Vol 12 (3) ◽  
pp. 14
Author(s):  
Wan Sallha Yusoff ◽  
Mohd Fairuz Md. Salleh ◽  
Azlina Ahmad ◽  
Norida Basnan
Keyword(s):  
Data Analysis ◽  
Panel Data ◽  
Firm Value ◽  
Financial Stability ◽  
Panel Data Analysis ◽  
Location Decisions ◽  
Asian Countries ◽  
Diversification Strategies ◽  
The Stability ◽  
Southeast Asian Countries

<p>This study investigates the relationships between financial hegemony groups, global diversification strategies and firm value of the Malaysia’s 30 largest companies listed in FTSE Bursa Malaysia Index Series during 2009 to 2012 period. We chose Malaysia as an ideal setting because the findings contribute to the phenomenon of the diversification–performance relationship in the Southeast Asian countries. We apply hegemony stability theory to explain the importance of financial hegemony groups in deciding international locations for operations. By using panel data analysis, we find that financial hegemony groups are significantly important in international location decisions. Results reveal that the stability of financial hegemony in BRICS and G7 groups enhances the financial value of the Malaysia’s 30 largest companies, whereas the stability of financial hegemony in ASEAN groups is able to enhance the non-financial value of the firms. Overall, this paper suggests that in order to diversify globally, it is necessarily for the manager in the guest country to evaluate and fully understand the host country’s geopolitical situation and its financial stability.</p>

Measurement of high-alumina cement-calcium carbonate reactions using DTA

Clay Minerals ◽  
1984 ◽  
Vol 19 (5) ◽  
pp. 857-864 ◽  
Author(s):  
H. G. Midgley
Keyword(s):  
Compressive Strength ◽  
Calcium Carbonate ◽  
High Alumina ◽  
Curing Time ◽  
Lower Strength ◽  
Alumina Cement ◽  
High Alumina Cement ◽  
Strength Tests ◽  
The Stability

AbstractHydrating high-alumina cement will react with calcium carbonate to form the complex mineral calcium carboaluminate hydrate, 3CaO.Al2O3.CaCO3.12H2O. This mineral is reported to be capable of providing strength in concrete and so may provide an alternative to the minerals normally found in the hydration of high-alumina cement, which may under certain conditions convert to other minerals with a loss in strength. Some doubt has been cast on the stability of calcium carboaluminate hydrate and it has been found that in hydrated high-alumina cement, calcium carboaluminate hydrate decomposes at temperatures in excess of 60°C. Cube compressive strength tests on high-alumina cement and high-alumina cement-calcium carbonate pastes have shown that the latter have a lower strength than pastes made with high-alumina cement alone. When cured at 50°C the high-alumina cement-calcium carbonate pastes show a loss in strength with curing time. Cements made with the high-alumina cement-calcium carbonate mixture always have a lower strength than those made with high-alumina cement alone and so no advantage is gained from their use.

Sign in / Sign up

Export Citation Format

Share Document