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Journal articles on the topic 'Aggregate specification'

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Published: 4 June 2021

Last updated: 11 February 2022

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1

Pranevičius, Henrikas, and Dalius Makackas. "SIMULATION OF STEVEDORING WORK IN THE KLAIPEDA OIL TERMINAL." TRANSPORT 17, no. 5 (2002): 188–93. http://dx.doi.org/10.3846/16483840.2002.10414041.

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The paper presents the approach of developing simulation models of stevedoring work in oil terminal using aggregate approach and simulation system ARENA. Aggregate approach permits to develop formal specification of simulated systems. Aggregate specification of the system is presented as a set of interacting piece-linear aggregates. Controlling sequences are used for formal description of each piece-linear aggregate. Transformation of aggregate formal specification to ARENA system operators permits to develop a simulation model. The developed model permits to evaluate characteristics of the Kl

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2

Castorena, Cassie, Mohammad Ilias, Javon Adams, and Y. Richard Kim. "Low-Temperature Emulsion Performance-Graded Specification for Chip Seals." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (2018): 266–76. http://dx.doi.org/10.1177/0361198118790133.

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Chip seals are applied to existing roadways to slow deterioration and improve pavement surface conditions without increasing the pavement’s structural capacity. Chip seals typically are comprised of asphalt emulsion and aggregate. Although it is well known that the properties of asphalt emulsion are critical to chip seal performance, the current specifications for these binders are empirical in nature and are not based on the properties that relate directly to chip seal performance. This study proposes emulsion performance-graded specifications that are designed to mitigate aggregate loss at l

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Duhan, Dale F., and John Saunders. "The Specification of Aggregate Market Models." Journal of Marketing Research 25, no. 3 (1988): 322. http://dx.doi.org/10.2307/3172539.

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Saunders, John. "The Specification of Aggregate Market Models." European Journal of Marketing 21, no. 2 (1987): 5–47. http://dx.doi.org/10.1108/eum0000000004681.

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5

Chen, How-Ji, and Chung-Hao Wu. "Influence of Aggregate Gradation on the Engineering Properties of Lightweight Aggregate Concrete." Applied Sciences 8, no. 8 (2018): 1324. http://dx.doi.org/10.3390/app8081324.

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Expanded shale lightweight aggregates, as the coarse aggregates, were used to produce lightweight aggregate concrete (LWAC) in this research. At the fixed water-cement ratio, paste quantity, and aggregate volume, the effects of various aggregate gradations on the engineering properties of LWAC were investigated. Comparisons to normal-weight concrete (NWC) made under the same conditions were carried out. From the experimental results, using normal weight aggregates that follow the specification requirements (standard gradation) obtained similar NWC compressive strength to that using uniform-siz

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Hilmer, Christiana E., and Matthew T. Holt. "Estimating Indirect Production Functions with a More General Specification: An Application of the Lewbel Model." Journal of Agricultural and Applied Economics 37, no. 3 (2005): 619–34. http://dx.doi.org/10.1017/s1074070800027127.

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Whereas consumer theory employs several different empirical specifications for estimating indirect utility functions, producer theory has relied on the Translog specification to estimate the indirect production function. In this paper, we apply Lewbel's more general functional specification and investigate its implications for the estimation of indirect production functions in productivity analysis. An attractive feature of the Lewbel model is that it nests both the Translog and the almost ideal supply system, offering a method to assess the empirical validity of all three specifications. Aggr

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7

Huber, Gerald A., J. Chris Jones, Paul E. Messersmith, and N. Mike Jackson. "Contribution of Fine Aggregate Angularity and Particle Shape to Superpave Mixture Performance." Transportation Research Record: Journal of the Transportation Research Board 1609, no. 1 (1998): 28–35. http://dx.doi.org/10.3141/1609-04.

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The Superpave system is being implemented by state highway agencies. Many states implemented the asphalt binder specification during 1997. The volumetric mix design system, however, is being actively implemented. By the end of 1997, more than 200 Superpave projects had been built in the United States. As states consider specification changes necessitated by Superpave implementation, some questions are being raised. Fine aggregate angularity (FAA) requirements, one of the aggregate consensus properties, has generated considerable debate in some areas of the country. Adopting an FAA requirement

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Gonfa, Lami Gonfa, Emer Tucay Quezon Tucay Quezon, and Anteneh Geremew. "EXPERIMENTAL STUDY ON APPLICATION OF MARBLE WASTE AS CONVENTIONAL AGGREGATE FOR BASE COURSE MATERIALS." Journal of Civil Engineering, Science and Technology 11, no. 2 (2020): 144–63. http://dx.doi.org/10.33736/jcest.2620.2020.

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Recently, highway and construction industries utilize a substantial quantity of conventional aggregates. The increasing demands for conventional aggregate cause an increase in the cost of construction, reduction of natural resource, and continuing deterioration of the earth's surface. On the other hand, the waste generated from the marble industries during the process of cutting and polishing was increasing day by day all over the world. In Ethiopia, the use of Marble Waste Aggregate materials in road construction as a base course material was not well-known, and it was simply wasted at every

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9

Easa, Said M. "Gradation, design, and cost consideration in blending aggregates for asphaltic concrete pavements." Canadian Journal of Civil Engineering 12, no. 1 (1985): 82–93. http://dx.doi.org/10.1139/l85-009.

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This paper presents an analytic (algorithmic) method for determining the optimum proportions of aggregates that satisfy specific gradation, design, and cost requirements of the blend. The gradation requirements include the specification limits and mean deviation from the midpoint of specifications limits. The design requirements include fineness modulus, plasticity index, and specific gravity. The optimum proportions may correspond to minimum mean deviation or minimum cost. In addition to providing the optimum solutions, the method provides the entire feasible region of proportions that may be

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10

Sánchez, Lucia Katherine Macías, Eduardo Humberto Ortiz Hernández, Luis Santiago Quiroz Fernández, and Wilter Enrique Ruiz Párraga. "Determination of Physical and Mechanical Properties of Quarries Dos Bocas Mouths and Mine Copeto for High Resistance Concretes." International Research Journal of Engineering, IT & Scientific Research 4, no. 2 (2018): 33. http://dx.doi.org/10.21744/irjeis.v4i2.633.

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The importance of the use, the type and the correct quality of the aggregate (aggregate) cannot be underestimated. Thin and coarse aggregates occupy about 60% to 80% of the volume of the concrete (70% to 85% of the mass) and strongly influence the properties both in the fresh and hardened state, in the proportions of the mixture and the economy of the concrete. Due to the great importance of the quality of the materials that must be used for high strength concretes, this research has been conducted to determine if the aggregates of the Dos Bocas and Copeto quarries meet the requirements outlin

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11

Luger, Michael I., and Dale O. Stahl. "Specification Errors in Models of Aggregate Labor Supply." Review of Economics and Statistics 68, no. 2 (1986): 274. http://dx.doi.org/10.2307/1925507.

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12

Duhan, Dale F. "Book Review: The Specification of Aggregate Market Models." Journal of Marketing Research 25, no. 3 (1988): 322–23. http://dx.doi.org/10.1177/002224378802500314.

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13

Mohd Ridzuan, Ahmad Ruslan, Azmi Ibrahim, and Abdul Manaff Mohd Ismail. "Influence of Waste Concrete Aggregates on the Performance and Durability of OPC Concrete." Scientific Research Journal 2, no. 2 (2005): 49. http://dx.doi.org/10.24191/srj.v2i2.9332.

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The effects of using crushed waste concrete as course aggregates upon compressive strength and carbonation were investigated. Waste concrete cubes, which had been tested for compressive strength in compliance with construction specification, were crushed and utilized as coarse recycled aggregates in new concrete. It is important to mention that, in order to simulate the real life conditions, waste concrete with very minimal information about its originality was used in its natural moisture condition. Tests on the aggregates showed that the recycled concrete aggregates have lower specific gravi

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14

Rante, Gideon, Alpius, and Sufiati Bestari. "Pemanfaatan Batu Gunung Tambolang Kabupaten Toraja Utara Pada Campuran Laston AC-BC." Paulus Civil Engineering Journal 3, no. 2 (2021): 238–46. http://dx.doi.org/10.52722/pcej.v3i2.252.

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This research was conducted to determine the aggregate characteristic value, the AC-BC mixture design, and the Marshall stability value of the remaining AC-BC mixture design through the Conventional Marshall and Marshall Immersion testing with reference to the 2018 General specifications (Division 6) of the Ministry of PubIic Works and PubIic Housing of the RepubIic of lndonesia. and SNI Testing Standards. Before designing the composition for Conventional Marshall testing and making test specimens to obtain residual Marshall stability, the first thing to do is test the characteristics of coars

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Shon, Chang-Seon, Youn Su Jung, Don Saylak, and Surendra K. Mishra. "Development of synthetic aggregate using off-ASTM specification ashes." Construction and Building Materials 38 (January 2013): 700–707. http://dx.doi.org/10.1016/j.conbuildmat.2012.09.009.

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16

Bhaskar, V. "A new specification for aggregate employment in the U.K." European Economic Review 36, no. 6 (1992): 1223–33. http://dx.doi.org/10.1016/0014-2921(92)90028-u.

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17

Rogers, Chris, and Stephen Senior. "Experience with end-result specifications for granular base aggregates in Ontario." Canadian Journal of Civil Engineering 34, no. 9 (2007): 1169–79. http://dx.doi.org/10.1139/l07-033.

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In 1982, the Ontario Ministry of Transportation (MTO) introduced end-result specifications (ERS) for the acceptance of granular base and subbase aggregates with respect to lot-by-lot statistical testing for grading and percentage of crushed particles. Under ERS, the mean and range of four test results (sublots) were used to determine the payment for specific production quantities (lots). Quality assurance (QA) sampling and testing were conducted at the aggregate source by the MTO. Materials within a lot that were, on average, marginally outside the specification limits or exhibited a wide rang

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18

Huber, Gerald A., Xishun Zhang, and Robin Fontaine. "Superpave Models: Predicting Performance during Design and Construction." Transportation Research Record: Journal of the Transportation Research Board 1545, no. 1 (1996): 105–12. http://dx.doi.org/10.1177/0361198196154500114.

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The Strategic Highway Research Program (SHRP) spent $50 million researching asphalt binders and asphalt mixtures and provided three main products: an asphalt binder specification, an asphalt mixture specification, and Superpave, an asphalt mixture design system that encompasses both the binder and mixture specification. SHRP researchers have provided tools that promise more robust asphalt mixtures with reduced risk of premature failure. Implementation of the specifications and mix design system will require overcoming several obstacles. Superpave must be demonstrated to be practical and easy t

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19

Al-Mosawe, Hasan, Nick Thom, Gordon Airey, and Amjad Al-Bayati. "Effect of Aggregate Gradation on the Stiffness of Asphalt Mixtures." International Journal on Pavement Engineering & Asphalt Technology 16, no. 2 (2015): 39–49. http://dx.doi.org/10.1515/ijpeat-2015-0008.

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Abstract Aggregate gradation plays an important role in the behaviour of asphalt mixtures. Packing of aggregate is a very important factor that will be affected by changing the aggregate gradation. Many researchers have investigated different ways of describing packing both theoretically and practically. Bailey ratios have recently been used to understand the volumetric properties of mixtures. In this paper, the Bailey ratios have been used, and two further ratios have also been introduced to allow the asphalt mixture gradation to be fully understood. Thirteen different aggregate gradations ha

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20

Bhargava, Nishant, Anjan Kumar Siddagangaiah, and Teiborlang Lyngdoh Ryntathiang. "Reliability of Microsurfacing Mix Subjected to Variation in Aggregate Gradation." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 11 (2020): 720–30. http://dx.doi.org/10.1177/0361198120948855.

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Reliability analysis describes the probability of the pavement satisfying the performance criteria throughout its design life. Assigning reliability during the design stage is vital for the proper planning of maintenance and rehabilitation activities. In this respect, this study evaluates the reliability of microsurfacing mix subjected to variations in aggregate gradation. A total of 10 different combinations of aggregate gradation were selected where the initial five combinations were based on the specification limits and the other five were randomly generated using Monte Carlo simulation. Th

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21

Hassan, K. E., M. S. Kuwari, and J. M. Reid. "Site Trials of Recycled and Secondary Aggregates in Concrete and Concrete Blocks in Qatar." International Journal on Pavement Engineering & Asphalt Technology 15, no. 2 (2014): 37–53. http://dx.doi.org/10.2478/ijpeat-2013-0011.

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Abstract A major construction programme is underway in Qatar. A shortage of local aggregate is focusing attention on the use of recycled and secondary aggregates. Site trials using locally available materials in structural concrete and concrete blocks were carried out in three small buildings. By far the largest source of recycled and secondary aggregates in Qatar is construction, demolition and excavation waste, which is generally crudely separated into excavation waste (EW) and construction/demolition waste (CDW). The other material investigated was incinerator bottom ash (IBA). The EW was u

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22

Tarigan, Gunawan, Muhammad Husni Malik Hasibuan, Marwan Lubis, et al. "Effects of Aggregate Abrasrion Values to Marshall Properties of Asphalt Concrete AC- WC." International Journal of Engineering & Technology 7, no. 3.2 (2018): 789. http://dx.doi.org/10.14419/ijet.v7i3.2.18758.

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Asphalt Concrete AC-WC is one of the most common pavement types used in Indonesia, consisting of a mixture of hard asphalt, filler and a continuous graded aggregate, which is mixed, pave and compacted at a certain temperature. The mixture of ashpalt concrete requires a mixing process that uses materials as the specifications. Aggregate abrasion becomes an important part that will be examined based on aggregate hardness each of quarry. Source of material are from Selayang, Sibiru-biru and Armed. Reference for properties value that use in this study is specification from Public Works Department

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23

Thanaya, I. Nyoman Arya, I. Gusti Raka Purbanto, and I. G. Wikarga. "Properties of Sand Sheet Asphalt Mixture Incorporating Waste Plastic." Applied Mechanics and Materials 776 (July 2015): 9–16. http://dx.doi.org/10.4028/www.scientific.net/amm.776.9.

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Construction of road pavement requires large amount of materials. Effort to incorporate secondary or lower quality materials had been done. This is particularly attractive for constructing lower trafficked road. Within this experiments waste polypropylene (PP) plastic was used as partial aggregate substitute in sand sheet asphalt mixture, with objective to evaluate its properties. The amount of plastic used was 10%, 20%, and 30%. The aggregate and plastic were proportioned. The aggregate were heated to around 155-160 °C, then pre-melted asphalt and the waste plastic were added then re-mixed un

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Ardalan, Nazanin, Douglas J. Wilson, and Tam J. Larkin. "Analyzing the Application of Different Sources of Recycled Concrete Aggregate for Road Construction." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 8 (2020): 300–308. http://dx.doi.org/10.1177/0361198120924664.

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Because of the environmental, planning, and resource restrictions in the exploration and processing of natural aggregates, interest in better utilizing recycled aggregates in road pavement construction is increasing. Several researchers have investigated the characteristics of recycled concrete aggregate (RCAg) with the aim of understanding its performance as a base-course unbound material. As the pavement design techniques and the properties of re-processed RCAg in each country are non-homogeneous, previous international research on recycled aggregate cannot necessarily be incorporated in New

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25

Handayani, Ratna, and Ahmad Faathir Wicaksono. "USAGE OF RECLAIMED ASPHALT PAVEMENT AS A MIXTURE MATERIAL OF ASPHALT CONCRETE - WEARING COURCE (ACWC)." Journal Innovation of Civil Engineering (JICE) 1, no. 2 (2021): 97. http://dx.doi.org/10.33474/jice.v1i2.10998.

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The objective of this research is to utilize Reclaimed Asphalt Pavement (RAP) as a mixture of hot asphalt AC-WC type. The new additional material is required such as an aggregate and asphalt to meet the technical performance which is based on Specification Bina Marga 2018 Revision 2. This research is started by analyzing the RAP. The result of RAP extraction process are aggregates and asphalt. Grading on aggregate were conducted for required grading envelope. If it failed to qualify for required grading envelope, new aggregate and new asphalt is needed. Therefore, the AC-WC mixture was compose

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Jing, Guan. "Analysis of Influence of Fine Aggregate on Void Ratio of Asphalt Mixture." Applied Mechanics and Materials 587-589 (July 2014): 1079–83. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1079.

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Using molding with different fine aggregate, gradation, asphalt, aggregate forming and forming method, and calculate the sample porosity. The test results show that: The basalt coarse-fine aggregate molding, specimen void ratio was larger, are beyond the regulatory requirements; basalt coarse aggregate molding and limestone fine aggregate molding, specimen porosity is small, can meet the requirements of specification range. The main reason is that the basalt thin bulk density is big, and its not easy compaction.

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Latham, J. P. "Assessment and specification of armourstone quality: from CIRIA/CUR (1991) to CEN (2000)." Geological Society, London, Engineering Geology Special Publications 13, no. 1 (1998): 65–85. http://dx.doi.org/10.1144/gsl.eng.1998.013.01.06.

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AbstractAs a typical by-product to normal quarrying, armourstone has many attributes that make its objective specification and testing less straightforward than most producers would wish. Neither, it appears, has the market forces principle and tendering practices in the UK construction industry, leading to minimal forward planning of armourstone testing, helped to enhance quality control of materials. The undoubted advances heralded by the standardizing approach of the CIRIA/CUR Manual on the Use of Rock in Coastal and Shoreline Engineering and its model specification have done much to ration

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Muhammad Riski, Febrina Dian Kurniasari, and Bunyamin. "The Effect of Mixing Natural Aggregates with Artificial Aggregates on Marshall Parameters." Jurnal Inotera 6, no. 1 (2021): 10–19. http://dx.doi.org/10.31572/inotera.vol6.iss1.2021.id135.

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    In general, aggregates consist of Natural Aggregates (NA) and Artificial Aggregates (AA). Artificial aggregates, such as Crushed Stone (CS), are aggregates produced through the crusher industry which has a rough and angular surface so that it has excellent adhesion to asphalt. Meanwhile, NA is an aggregate produced from a river which has a smooth and large hollow surface texture. The cost for AA is very expensive when compared to NA, so it is necessary to experiment with mixing NA and AA to minimize the use of AA. NA are obtained from Sungai Jalin, Jantho City Distr

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Junek, Vladimír, Jiří Kolísko, Martin Kroc, and Isabela Bradáčová. "Developing Fire Resistant Construction for Tunnel Construction Using Lightweight Aggregate Concrete." Advanced Materials Research 1106 (June 2015): 172–76. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.172.

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The article describes partial results of the research of fire and technical properties of lightweight concrete with regard to the possibility of the application of lightweight concrete in tunnel structure wall lining. The article summarises partial results of individual parts of the project focused on the specification of material properties, execution of temperature analysis of the fire resistance, calculation of structure heat transmission and specification of the thermal response of the material as subject-matter to the research.

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30

Cheney, Laura M., A. Blake Brown, Takashi Yamano, and Michael Masterovsky. "Issues of Demand Specification and Industry Structure in Turkeys and Broiler Chickens." Journal of Agricultural and Applied Economics 33, no. 1 (2001): 25–34. http://dx.doi.org/10.1017/s1074070800020757.

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AbstractFactors unique to the turkey industry suggest that conclusions concerning market structure and demand specification drawn from aggregate poultry data cannot necessarily be extrapolated to the turkey industry. The Wu-Hausman endogeneity test is used to examine demand specifications and industry structure specifically for turkey meat. In contrast to general poultry, quantity—not price—is found to be predetermined in demand models that use annual turkey data. Quarterly demand analysis suggests this result stems from biological cycles that limit a producer's ability to react to price chang

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Patel, Arti, Marshall Thompson, Eric Harm, and William Sheftick. "Developing QC/QA Specifications for Hot Mix Asphalt Concrete in Illinois." Transportation Research Record: Journal of the Transportation Research Board 1575, no. 1 (1997): 66–74. http://dx.doi.org/10.3141/1575-10.

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The Illinois Department of Transportation (IDOT) has recently undertaken a quality management program to improve the quality of construction, allow more innovation, and reduce IDOTs management of industry construction programs. The Asphalt Concrete (AC) Quality Control/Quality Assurance (QC/QA) program is a significant part of this quality management program. IDOT accredits the success of the AC QC/QA program to gradual implementation and contractor and industry involvement. In 1991, four projects were constructed under a newly developed QC/QA specification. After reviewing and evaluating feed

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32

GEBSER, MARTIN, AMELIA HARRISON, ROLAND KAMINSKI, VLADIMIR LIFSCHITZ, and TORSTEN SCHAUB. "Abstract gringo." Theory and Practice of Logic Programming 15, no. 4-5 (2015): 449–63. http://dx.doi.org/10.1017/s1471068415000150.

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AbstractThis paper defines the syntax and semantics of the input language of the ASP groundergringo. The definition covers several constructs that were not discussed in earlier work on the semantics of that language, including intervals, pools, division of integers, aggregates with non-numeric values, and lparse-style aggregate expressions. The definition is abstract in the sense that it disregards some details related to representing programs by strings of ASCII characters. It serves as a specification forgringofrom Version 4.5 on.

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33

Gao, Li Xiong, Li Juan Kong, and Xue Gang Du. "Study on the Curve of Lightweight Aggregate Concrete Compressive Strength by Rebound Method." Key Engineering Materials 477 (April 2011): 268–73. http://dx.doi.org/10.4028/www.scientific.net/kem.477.268.

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Testing strength curve of 1400~1900 density grade lightweight aggregate concrete by rebound method was studied systematically. Results show that, adopting the Chinese national unified testing strength curve, specified by JGJ/T 23-2001 of Technical Specification for Detection of Concrete Compressive Strength by Rebound Method, to detect the lightweight aggregate concrete strength, the strength scaled value obtained is higher, which would reduce the structure assurance coefficient. The special testing strength curve of 1400~1900 density grade and LC15~LC50 strength grade lightweight aggregate co

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Gao, Li Xiong, Li Juan Kong, and Lei Xu. "On the Testing Strength Curve of Clay and Fly Ash Lightweight Aggregate Concrete by Rebound Method." Advanced Materials Research 177 (December 2010): 545–48. http://dx.doi.org/10.4028/www.scientific.net/amr.177.545.

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Testing strength curve of 1400~1900 density grade and LC15~LC50 strength grade lightweight aggregate concrete by rebound method was studied systematically. Results show that, adopting the Chinese national unified testing strength curve, specified by JGJ/T 23-2001 of Technical Specification for Detection of Concrete Compressive Strength by Rebound Method, to detect the lightweight aggregate concrete strength, the strength scaled value obtained is higher, which would reduce the structure assurance coefficient. The special testing strength curve of 1400~1900 density grade and LC15~LC50 strength g

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35

Martínez-Espiñeira, Roberto. "Price specification issues under block tariffs: a Spanish case study." Water Policy 5, no. 3 (2003): 237–56. http://dx.doi.org/10.2166/wp.2003.0014.

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A panel of aggregate data from Spain is used to estimate domestic water demand functions under linear and non-linear tariffs. The use of intra-annual European data constitutes an innovative contribution. The average price per unit of water sold is compared with other price specifications that have been suggested to analyze aggregate data. Average-price elasticity estimates lie between -0.51 and -0.67 and are substantially larger than marginal-price elasticity estimates. Elasticities appear inversely correlated to the size of free allowances covered by minimum charges. Climatic variables seem t

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Rodrik, Dani. "Unconditional Convergence in Manufacturing *." Quarterly Journal of Economics 128, no. 1 (2012): 165–204. http://dx.doi.org/10.1093/qje/qjs047.

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Abstract Unlike economies as a whole, manufacturing industries exhibit strong unconditional convergence in labor productivity. The article documents this at various levels of disaggregation for a large sample covering more than 100 countries over recent decades. The result is highly robust to changes in the sample and specification. The coefficient of unconditional convergence is estimated quite precisely and is large, at between 2–3% in most specifications and 2.9% a year in the baseline specification covering 118 countries. The article also finds substantial sigma convergence at the two-digi

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Kazmee, Hasan, Erol Tutumluer, and Sheila Beshears. "Evaluating Constructed Aggregate Layers of Working Platforms and Flexible Pavements: Adequacy of In-Place Quality Control and Quality Assurance Techniques." Transportation Research Record: Journal of the Transportation Research Board 2655, no. 1 (2017): 1–12. http://dx.doi.org/10.3141/2655-01.

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Quality assurance is extremely important for satisfactory end performance of a constructed pavement. Traditional quality control and quality assurance (QC/QA) procedures based on volumetric and surface property checks are becoming outdated when used for constructing pavement foundation layers and ensuring pavement longevity. Recent emphasis in QC/QA procedures has shifted from a density-based approach to stiffness- and strength-based approaches with newly adopted advanced technologies. However, the need for QC/QA is often overlooked in the construction of low-volume roads with unbound aggregat

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Zhao, Shun Bo, Na Liang, Xiao Lu Ma, and Su Yang. "Experiment of Carbonization for Wet-Sieving Fine Aggregate Concrete Made from Ordinary Concrete." Advanced Materials Research 201-203 (February 2011): 2887–90. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2887.

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The research in this paper is part of wet-sieving concrete technique for building thermal insulated reinforced concrete composite wall. The carbonized depths of fine aggregate concrete and ordinary concrete were measured by the carbonization test method. Based on the test, in standard test environmental conditions, the carbonization changes of fine aggregate concrete rely on its inherent combination changes. The lower carbonized depth takes place in fine aggregate concrete comparing with ordinary concrete, which is resulted from the increasing cement content and the reduction of grain size of

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Hung, Vu Viet, Soo-Yeon Seo, Hyun-Woo Kim, and Gun-Cheol Lee. "Permeability and Strength of Pervious Concrete According to Aggregate Size and Blocking Material." Sustainability 13, no. 1 (2021): 426. http://dx.doi.org/10.3390/su13010426.

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The purpose of this study is to identify the differences in porosity and permeability coefficients when the mixing ratio of aggregates is different and to present the mixing ratio satisfying the strength requirement of compressive specified in a specification of Korea. Three mix ratios were suggested by considering various aggregate sizes and three cylinders were made for each ratio. The porosities of those cylinders were evaluated through the compression and water permeability test, measuring the weight of specimens in underwater and analysis of the pictured Computed Tomography (CT) image. Ex

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Liu, Jui Ling, Dung Myau Lue, and Ping T. Chung. "The Application of Light Weight Aggregate Using Reservoir Sediments for Concrete Filled Columns." Applied Mechanics and Materials 284-287 (January 2013): 1379–84. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1379.

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In the current 2005 AISC specification, the in-filled light-weight concrete strength (fc´) of concrete-filled tube (CFT) columns is set in the range of 21~ 42 MPa, but with no real substantial testing data to confirm and verify the provisions. Research work related to rectangular column sections with light-weight concrete is rather limited and deserves further investigation. Eighteen rectangular tubes filled with light-weight concrete with fc´ varying from21.4 to43.5 MPa were tested. A special kind of light weight aggregate using find sediment deposits dredged from a local reservoir in Taiwan

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Diefenderfer, Stacey D., Benjamin F. Bowers, and Kevin K. McGhee. "Impact of Gyration Reduction and Design Specification Changes on Volumetric Properties of Virginia Dense-Graded Asphalt Mixtures." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (2018): 143–53. http://dx.doi.org/10.1177/0361198118787940.

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In 2015, the Virginia Department of Transportation (VDOT) proposed changes to their specification for asphalt mix design. The changes incorporated a reduction of design gyrations from 65 to 50; the addition of constraints on the No. 4 (4.75 mm) and No. 30 (600 µm) sieves; and adjustments to the production value for voids filled with asphalt and minimum voids in mineral aggregate. Before these modifications were fully adopted, a study was performed to assess the effect of the changes on mixture properties and laboratory performance. Eleven pairs of asphalt mixtures were evaluated; the pairs con

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Mavroeidis, Sophocles, Mikkel Plagborg-Møller, and James H. Stock. "Empirical Evidence on Inflation Expectations in the New Keynesian Phillips Curve." Journal of Economic Literature 52, no. 1 (2014): 124–88. http://dx.doi.org/10.1257/jel.52.1.124.

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We review the main identification strategies and empirical evidence on the role of expectations in the New Keynesian Phillips curve, paying particular attention to the issue of weak identification. Our goal is to provide a clear understanding of the role of expectations that integrates across the different papers and specifications in the literature. We discuss the properties of the various limited-information econometric methods used in the literature and provide explanations of why they produce conflicting results. Using a common dataset and a flexible empirical approach, we find that resear

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ARIZE, AUGUSTINE. "SPECIFICATION TESTS OF THE AGGREGATE IMPORT DEMAND MODEL IN DEVELOPING COUNTRIES." International Economic Journal 5, no. 1 (1991): 79–89. http://dx.doi.org/10.1080/10168739100080006.

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Bullen, Frank. "Use of Coral-Derived Aggregates for Construction of Low-Volume Roads." Transportation Research Record: Journal of the Transportation Research Board 1819, no. 1 (2003): 134–42. http://dx.doi.org/10.3141/1819b-17.

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Many tropical island and coastal regions suffer from a paucity of recognized engineering aggregates. In these regions river gravel and old uplifted coral reef formations are often the only economically viable materials. Typically, the coral-derived material most widely available for use is termed coronous material, a land-based uplifted coral reef that may contain an abundance of plastic fines and that is usually easily excavated without the use of explosives. The shortage of traditional aggregates and the availability of the upraised reefs have promoted the study of the use of coral-derived a

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Olugbenga, Oyedepo J. "Utilization of Industrial Waste Products in the Production of Asphalt Concrete for Road Construction." Slovak Journal of Civil Engineering 27, no. 4 (2019): 11–17. http://dx.doi.org/10.2478/sjce-2019-0026.

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Abstract The utilization of industrial waste products to produce asphalt concrete for road construction was investigated. Aggregates were partially replaced with aluminum slag (AS) and crushed ceramic tiles (CCT) at 10%, 20%, 30%, 40%, and 50% by weight. Physical tests were performed on the aggregates, while a flash and fire point test as well as penetration tests were carried out on the bitumen. Similarly, Marshall stability tests were conducted on cylindrical specimens of the asphalt concrete. The average values of 18.88 and 30.69 obtained for the aggregate impact value (AIV) and aggregate c

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Zhao, Shun Bo, Qi Guo, Guang Xin Li, and Yan Feng Su. "Basic Mechanical Properties of Concrete with Machine-Made Sand and Recycled Coarse Aggregate." Applied Mechanics and Materials 357-360 (August 2013): 1102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.1102.

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Experimental study was carried out on the concrete mixed with machine-made sand and recycled coarse aggregate (MSRAC), three strength grades of concrete were designed by changing the water to cement ratio as 0.36, 0.45 and 0.55, while the sand ratio varied in a range of 32%~38%, 32%~42% and 38%~44% successively. The workability and the mechanical properties such as compressive and splitting tensile strengths and elastic modulus of MSRAC were tested. The results show that although the mechanical properties of MSRAC were influenced by sand ratio, they were still controlled by the water to cement

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Salunkhe, Bhavesh, and Anuradha Patnaik. "The IS Curve and Monetary Policy Transmission in India: A New Keynesian Perspective." Margin: The Journal of Applied Economic Research 12, no. 1 (2018): 41–66. http://dx.doi.org/10.1177/0973801017738420.

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The present study assesses the empirical performance of the new Keynesian IS model by estimating the standard as well as extended specifications of both the backward-looking and hybrid models in India over the period 1998Q1 to 2015Q4. It is found that the backward-looking IS model fits the data quite well in comparison with the hybrid model. The link between the policy rate and output gap appeared to be a bit stronger in the extended backward-looking IS model, as the interest rate coefficient is larger. Also, besides the interest rate, the real exchange rate, external demand and crude oil pric

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Li, Wentao, Douglas J. Wilson, Tam J. Larkin, and Philippa M. Black. "Permanent Strain Behavior of Marginal Granular Material." Transportation Research Record: Journal of the Transportation Research Board 2655, no. 1 (2017): 54–63. http://dx.doi.org/10.3141/2655-08.

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To better understand the marginality of marginal granular materials (i.e., an aggregate that does not fully meet a premium quality specification), this study investigated the permanent strain behavior of two granular materials with different geological and mineralogical characteristics under repeated loading and different moisture conditions. The secant permanent strain rate and shakedown approach were used to analyze the permanent strain behavior of the materials. A one-dimensional swelling test was used to explain the mechanism of the permanent strain behavior of the soaked materials under r

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Tan, Bo, Rui Hua Yang, and Yan Ting Lai. "Application of Fractal Theory in Aggregate Gradation Research." Applied Mechanics and Materials 204-208 (October 2012): 1923–28. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1923.

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The paper presents the fractal dimension formula of distribution of asphalt mixture aggregate diameter by the deducing mass fractal characteristics function. Taking AC-20 and SMA-20 as examples, selected 6 groups of representative grading curves within the grading envelope proposed by the present specification, and calculated their fractal dimensions. The asphalt mixture gradation has fractal dimension D (D∈(1,3)), and the fractal of continuous gradation is single while the fractal of gap-gradation shows multi-fractal with 4.75 as the dividing point. Fractal dimension of aggregate gradation of

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Thanaya, I. Nyoman Arya, I. G. R. Purbanto, and I. M. S. J. Negara. "Study on the Properties of Sand Sheet Asphalt Mixture Using Old Road Pavement Milling and Asphalt Emulsion." Applied Mechanics and Materials 845 (July 2016): 385–93. http://dx.doi.org/10.4028/www.scientific.net/amm.845.385.

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This paper describes experiments on sand sheet (SS) asphalt mixture utilizing reclaimed asphalt pavement (RAP) from road milling of old road pavement. Natural aggregate was added to adjust the aggregate grading to closely meet specification. The mixture was bound with asphalt emulsion cationic rapid setting (CRS), type CRS-1. The SS mix was produced by hotmix procedure, compacted with 2x50 Marshall blows. Sand sheet asphalt mixture is dedicated for low to medium trafficked road pavement. The asphalt content of the RAP was extracted, and contained 5.29%. The performance of the SS mix was compar

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