scholarly journals Cost-Effective Construction Innovations/Improvements for CRCP: Volume 5

2021 ◽  
Author(s):  
Tyler Speakmon ◽  
◽  
Mirmilad Mirsayar ◽  
Atheer Jumah ◽  
Dan Zollinger ◽  
...  
Keyword(s):  
Transverse Crack ◽  
Cost Effective ◽  
Crack Spacing ◽  
Base Layer ◽  
Key Factors ◽  
Interfacial Bond ◽  
Cracking Behavior ◽  
Erosion Damage ◽  
Initial Cost ◽  
Pavement Construction

This volume addresses key factors such as cracking behavior of CRC pavement, end movements at terminal and header joints, and interfacial bond and erosion damage between the slab and the base layer as it may pertain to punchout development and the performance of CRCP. This volume also addresses measures to reduce initial cost of CRC pavement construction through modification of base types, pavement and jointing configuration, and transverse crack spacing variability.

Early Age Performance of Continuously Reinforced Concrete Pavement with Different Types of Aggregate

1997 ◽  
Vol 1568 (1) ◽  
pp. 35-43
Author(s):  
Yoon-Ho Cho ◽  
Terry Dossey ◽  
B. Frank Mccullough
Keyword(s):  
Reinforced Concrete ◽  
Field Test ◽  
Field Tests ◽  
Concrete Pavement ◽  
Crack Spacing ◽  
Winter Period ◽  
Thermal Coefficient ◽  
Curing Methods ◽  
Pavement Construction ◽  
New Variables

The effect of coarse aggregate on pavement performance has been attributed to the volume of aggregate used in pavement construction. The different patterns of crack development for limestone (LS) and siliceous river gravel (SRG) are a typical example of aggregate-induced variable performance in continuously reinforced concrete pavement (CRCP). An attempt was made to find a reasonable solution for pavements with SRG. As a way to solve the performance problem observed from the SRG pavement, a blended aggregates mixture was suggested. Laboratory and field tests were performed to check the feasibility of their application in pavements. From the laboratory test, a 50:50 blending ratio was suggested after considering the effect on tensile strength and thermal coefficient of expansion. Field test sections were also constructed to verify previous performance observations for the two aggregates and to provide performance data for new variables such as blended aggregates and special curing methods. Unexpectedly, the blended mixture did not improve the performance of SRG pavement; rather it experienced worse cracking than SRG alone. A controlled experiment with additional field test sections is needed to verify or disprove this finding. The only definitive finding was that selection of aggregate in the concrete pavement is a vital consideration for the design of the pavement. The CRCP8 analytical program reasonably predicted crack spacing for both SRG and LS pavements, predicting mean crack spacing of 0.99 m (3.25 ft) for SRG and 1.98 m (6.41 ft) for the limestone. These values are somewhat below the actual spacing observed at 100 days. Data collected after the first winter period will be required to calibrate the program.

Quality Assurance Methods Applied For Exposed-Aggregate Concrete Pavement Construction

2021 ◽  
Author(s):  
Adam Glinicki ◽  
Michal Glinicki
Keyword(s):  
Quality Assurance ◽  
Early Stage ◽  
Traffic Noise ◽  
Cost Effective ◽  
Weather Conditions ◽  
Special Treatment ◽  
Aggregate Concrete ◽  
Adverse Weather ◽  
Pavement Construction

The exposed aggregate pavement technology for construction of concrete highways is used in European countries, including Poland, mostly for heavy trafficked roads. It is mainly a two-lift slip-form technology with a special treatment of the top surface after the final smoothing operation. This is a demanding technology that leaves a little margin for mistakes. When properly done the pavement layer with exposed aggregates ensures designed skid resistance for vehicle wheels even in adverse weather conditions without excessive traffic noise. The challenge is to provide its cost-effective long term performance including both the adequate roughness and the desired smoothness of the pavement. The paper presents tools and methods for construction quality assurance specific for exposed aggregate concrete pavements. Required monitoring of the stability of concrete mix properties is discussed. The importance of concrete curing is analyzed in respect to the long term durability in wet-freeze regions with heavy use of deicing salts. Macrotexture assessment at the early stage of pavement construction is seen as the key factor for assurance of the proper skidding resistance. Local evaluation of smoothness is also a useful approach to assure the target IRI. Examples of quality assurance efforts applied on concrete highways recently constructed in Poland are presented.

Regularity of the transverse crack spacing in a damaged laminate

1997 ◽  
Vol 56 (3) ◽  
pp. 221-224
Author(s):  
Robert C. Wetherhold ◽  
David J. Thomas
Keyword(s):  
Transverse Crack ◽  
Crack Spacing

New and Simpler Cracking Test Method for Asphalt Mix Designs

2017 ◽  
Vol 2631 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Soohyok Im ◽  
Fujie Zhou
Keyword(s):  
Field Performance ◽  
Cost Effective ◽  
Test Methods ◽  
Environmental Conservation ◽  
Test Method ◽  
Asphalt Pavements ◽  
Cracking Resistance ◽  
Cracking Behavior ◽  
Asphalt Mixes ◽  
Asphalt Mix

Because of environmental conservation and sustainability concerns, reclaimed asphalt pavements and recycled asphalt shingles are increasingly used in the asphalt paving industry to replace virgin asphalt and aggregate materials. However, these recycled materials are often highly aged and can cause cracking issues for asphalt pavements. Additionally, other factors such as binder additives, modifiers, and multiple warm-mix asphalt technologies can alter the performance of the mixtures both positively and negatively. The volumetric mix design alone is not sufficient for evaluating the potential cracking behavior of asphalt mixes. Although many cracking test methods are available, there is no widely accepted performance-related cracking test method that is practical enough for routine use in asphalt mix designs. This paper presents a newly developed, simple, and practical cracking test method for asphalt mix designs. The new cracking test method is repeatable, time- and cost-effective, easily implemented, sensitive to mix compositions, and well correlated to field performance. The new cracking test is performed at an intermediate temperature of 25°C and a loading rate of 50 mm/min. Furthermore, a unitless index is proposed as the cracking resistance indicator for evaluation of the cracking resistance of asphalt mixes. Additionally, the effectiveness of the new cracking test was validated with the test results from FHWA’s accelerated loading facility.

Investigation and Analysis on Transverse Crack Spacing Distribution in Continuously Reinforced Concrete Pavement in China

2013 ◽  
Vol 690-693 ◽  
pp. 1817-1820
Author(s):  
Quan Man Zhao ◽  
Hong Liang Zhang ◽  
Yan Hui Wang
Keyword(s):  
Reinforced Concrete ◽  
Transverse Crack ◽  
Concrete Pavement ◽  
Crack Spacing ◽  
Transverse Cracks ◽  
Spacing Distribution ◽  
Field Investigations ◽  
The Us

The longterm field investigations in the US showed that punchouts were the most important distress in continuously reinforced concrete pavement (CRCP) and often developed in the cluster cracking with the crack spacing of 0.3m-0.6m. But, it was not sure whether punchouts were the most important distress in CRCP in China, so this paper carried out field investigations on several CRC pavements in China. Results showed that punchouts were the most serious distress and often occurred in cluster crack regions. Furthermore, this paper analyzed the transverse crack spacing distribution. Results showed that the transverse cracks spacing distribution followed Weibull’s distribution.

Reduced Weight Scatter with Bonded Powder Mixes

2007 ◽  
Vol 534-536 ◽  
pp. 309-312
Author(s):  
Daniel Edman ◽  
Luigi Alzati ◽  
Giovanni Pozzi ◽  
Carlo Frediani ◽  
Riccardo Crosa
Keyword(s):  
Cost Effective ◽  
Key Factors ◽  
Dimensional Control ◽  
Dimensional Properties ◽  
The Stability ◽  
Manufacturing Technologies ◽  
Filling Characteristics

Organically bonded P/M mixes have been developed to improve the stability of dimensional properties by reducing the segregation of the mix constituents and improving the filling characteristics. Robustness and reliability are key factors for the promotion of P/M as cost effective substitute of competing manufacturing technologies. Based on the production of four different belt pulleys, this paper presents the achievement of reduced weight scatter and close dimensional control realizable by using a StarmixTM that is organically bonded.

scholarly journals Optimal Renovation Strategies for Education Buildings—A Novel BIM–BPM–BEM Framework

2018 ◽  
Vol 10 (9) ◽  
pp. 3287 ◽  
Author(s):  
Ming Hu
Keyword(s):  
Cost Savings ◽  
Cost Effective ◽  
Energy Performance ◽  
Performance Model ◽  
Building Performance ◽  
Initial Cost ◽  
Study Results ◽  
Carbon Emissions Reduction ◽  
Building Information ◽  
The University

The aim of this paper is to propose a novel building information model (BIM)–building performance model (BPM)–building environmental model (BEM) framework to identify the most energy-efficient and cost-effective strategies for the renovation of existing education buildings to achieve the nearly zero-energy goal while minimizing the environmental impact. A case building, the University of Maryland’s Architecture Building, was used to demonstrate the validity of the framework and a set of building performance indicators—including energy performance, environmental impacts, and occupant satisfaction—were used to evaluate renovation strategies. Additionally, this novel framework further demonstrated the interoperability among different digital tools and platforms. Lastly, following a detailed analysis and measurements, the case study results highlighted a particular energy profile as well as the retrofit needs of education buildings. Eight different renovation packages were analyzed with the top-ranking package indicating an energy saving of 62%, carbon emissions reduction of 84%, and long-term cost savings of 53%, albeit with a relatively high initial cost. The most preferable package ranked second in all categories, with a moderate initial cost.

Response Surface Optimization in Discharge Printing of Denim Using Potassium Permanganate as Oxidative Agent

2017 ◽  
Vol 35 (3) ◽  
pp. 204-214 ◽  
Author(s):  
Amna Siddique ◽  
Tanveer Hussain ◽  
Waseem Ibrahim ◽  
Zulfiqar Ali Raza ◽  
Sharjeel Abid ◽  
...  
Keyword(s):  
Response Surface ◽  
Potassium Permanganate ◽  
Treatment Time ◽  
Value Added ◽  
Cost Effective ◽  
Key Factors ◽  
Response Surface Optimization ◽  
Denim Fabric ◽  
Experimental Values ◽  
Good Agreement

The present study was carried out to optimize discharge printing process for fashionable denim garments. Response surface methodology, involving a central composite design with three key factors, namely, potassium permanganate (KMnO4) concentration, pH of the printing paste, and reaction time, was successfully employed. The objective of this work was to develop a cost-effective, value-added process for denim fabric, where losses in tensile and tear strengths were to be minimized, while whiteness effect of discharge was to be maximized. The optimum conditions for discharge printing with potassium permanganate were found to be pH 6, KMnO4 concentration of 42 g/kg, and treatment time of 15 min. The validity of experimental values was found to be in good agreement with optimized combination of three variables.

Study of Shell Cracking Behavior and its Remedies in Investment Casting Process Using Quick Cast Rapid Prototype Polymer Patterns

2012 ◽  
Vol 710 ◽  
pp. 214-219
Author(s):  
Ankit Sharma ◽  
Mayukh Acharya ◽  
Alok Agarwal ◽  
Govind ◽  
S.C. Sharma ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Investment Casting ◽  
Rapid Prototype ◽  
Dimensional Accuracy ◽  
Casting Process ◽  
Cost Effective ◽  
Direct Conversion ◽  
Cracking Behavior ◽  
Engineering Changes ◽  
Investment Casting Process

Investment casting has emerged as the foremost casting process for manufacturing of intricate parts where better dimensional accuracy is required. Use of rapid prototyping polymer patterns is one of the major advancements in investment casting process. Elimination of die making step as required in the traditional wax process makes it quicker and a cost effective process. The direct conversion of 3D CAD data into rapid prototyping pattern decreases development time, chances of costly mistakes, minimizes sustaining engineering changes and extend product lifetime by adding necessary features and eliminating redundant features early in the design.

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