Strength-Based Appropriateness of Sawdust Concrete for Rigid Pavement

2011 ◽  
Vol 367 ◽  
pp. 13-18
Author(s):  
O.M. Ogundipe ◽  
Y.A. Jimoh
Keyword(s):  
Fine Sand ◽  
Cylindrical Shape ◽  
Split Tensile Strength ◽  
Rigid Pavement ◽  
Cement Ratio ◽  
Base Materials ◽  
Rigid Pavements ◽  
Strength Based ◽  
Strength Tests ◽  
Compressive And Flexural Strengths

This paper presents the mechanical properties of sawdust concrete and its application as criteria for rigid pavement works. Sawdust concrete with nominal mixes 1:1:2, 1:1½:3, 1:2:4, 1:3:6, and 1:4:8 (1 part cement to 1, 1½, 2, 3 or 4 parts fine sand to 2, 3, 4, 6 or 8 parts sawdust) with 0.60 water-cement ratio were produced and cast into cubes, beams and cylindrical shape for the compressive, flexural and split tensile strength tests, modulus of elasticity and Poisson’s ratio tests. The derived values were compared with the Nigerian and British Ports Association standards/codes for rigid pavements. The slump values for all fresh mixes ranged between 0.10-0.20mm which indicated low workability, while their strength increased with maturity. Only nominal concrete mixes 1:1:2 and 1:1½:3 possessed adequate compressive and flexural strengths for rigid pavement works. Hence, they were recommended as sawdust concrete rigid pavement surfacing, cement bounded base or sub-base materials.

scholarly journals INFLUENCE OF METAKAOLIN ON PROPERTIES OF CONCRETE MODIFIED WITH POLYCARBOXYLATE ADMIXTURE FOR RIGID PAVEMENT REPAIR

2021 ◽  
pp. 90-97
Author(s):  
V.O. Kryzhanovskiy ◽  
◽  
S.O. Kroviakov ◽  
M.V. Zavoloka ◽  
◽  
...  
Keyword(s):  
Abrasion Resistance ◽  
Frost Resistance ◽  
Mineral Admixture ◽  
Rigid Pavement ◽  
Cement Replacement ◽  
Rigid Pavements ◽  
Concrete Mixtures ◽  
Total Shrinkage ◽  
Partial Cement Replacement ◽  
Positive Effect

Abstract. The effect of partial cement replacement with high-activity metakaolin on the strength, frost resistance, shrinkage and abrasion resistance of concrete modified with polycarboxylate admixture MasterGlenium SKY 608. Portland cement CEM II/A-S 42.5 (ПЦ II/А-Ш-500) with partial metakaolin replacement 15 kg (3.75 %) and 30 kg (7.5 %) was used for concrete preparation. The amount of superplasticizer in all studied compositions was 1.2% of cement weight. Slump of concrete mixtures was 6…7 cm. It was found that with increasing amount of metakaolin W/C ratio of mixtures increased slightly. The early compressive and flexural strength (at the age of 2 days) of the composition without metakaolin was higher than similar indicators with partial cement replacement with the active mineral admixture. It is worth noting the positive effect of increasing the metakaolin amount on early strength, because the composition with 30 kg metakaolin had strengths higher at 2 days of in difference to the composition with 15 kg metakaolin. It is necessary to note high frost resistance of all obtained concretes. Its grade of frost resistance reached F200 (evaluated according to the method for road concrete), which is equivalent to the grade F600 for structural concrete. Abrasion resistance was in the low range (0.30-0.31 g/cm2), total shrinkage does not exceed 0.28 mm/m, which in combination with high frost resistance has a positive effect on the durability of concrete mixtures for rigid pavements repair.

scholarly journals Rheology, Strength and Durability Characteristics of Alccofine Blended Fibre Reinforced Self Consolidating Concrete

2018 ◽  
Vol 7 (3.12) ◽  
pp. 209
Author(s):  
Bletty Baby ◽  
Jerry Anto ◽  
Basil Johny ◽  
Sreenath S
Keyword(s):  
Steel Fibre ◽  
Flow Characteristics ◽  
Strength Degradation ◽  
Fibre Content ◽  
Split Tensile Strength ◽  
Self Consolidating Concrete ◽  
Slump Flow ◽  
Strength Tests ◽  
Hardened Properties ◽  
Strength And Durability

In this study, observations were made on the effect of blending cement with fly ash and Alccofine on the fresh and hardened properties of micro steel fibre reinforced self-consolidating concrete (SCC). SCC mixes were prepared based on EFNARC guidelines. Blending has been done by replacing 5%, 10% and 15% of cement with Alccofine. Slump flow, L-box and V-funnel tests were conducted to study the flow characteristics of SCC. Compressive strength, split tensile strength, and flexural strength tests were performed to assess the strength characteristics. It was observed that the SCC with 10% replacement of cement with Alccofine showed better results than the other mixes. Further, the modification of the optimum blend with 10% Alccofine was made by adding variable percentages (0.5%, 1% and 1.5% by volume) of micro steel fibres and strength tests were conducted to optimise the fibre content. The strength degradation of the SCC with optimum Alccofine and fibre content exposed to alkaline, chloride and sulphate solutions was also studied.

scholarly journals Utilization of copper fiber waste to increase compressive strength and split tensile strength of rigid pavement

2021 ◽  
Vol 878 (1) ◽  
pp. 012052
Author(s):  
H Ndruru ◽  
R M Simanjuntak ◽  
S P Tampubolon
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Surface Layer ◽  
Concrete Slab ◽  
Residential Areas ◽  
Split Tensile Strength ◽  
Rigid Pavement ◽  
Traffic Loads ◽  
Pavement Construction ◽  
Low Traffic

Abstract The rigid pavement is a pavement construction in which a concrete slab is used as the top layer, which is located above the foundation or directly above the subgrade, without or with an asphalt surface layer. One type of rigid pavement used in Indonesia is rigid pavement without using reinforcement which is usually used in areas with low traffic or residential areas. Pavement without using reinforcement is the small split tensile strength so that the part of the plate will experience cracks due to stresses that cannot be avoided from traffic loads. Therefore, it is necessary to have reinforcement on the concrete slab so that the cracks do not extend. In this research, the use of copper fiber waste from electronic cables as a substitute solution for reinforcement to be used as a mixture in concrete. The experiments were carried out using fiber with variations of 0%, 0.5%, 1%, and 1.5% of the total weight of concrete mixture material and then tested at 28 days of concrete age. This research showed the variation of fiber weight until 1,5% increase the split tensile strength up to 32,46% and the compressive strength up to 9,16%.

scholarly journals Evaluation the effect of lime on the plastic and hardened properties of cement mortar and quantified using Vipulanandan model

2019 ◽  
Vol 9 (1) ◽  
pp. 468-480 ◽  
Author(s):  
Warzer Qadir ◽  
Kawan Ghafor ◽  
Ahmed Mohammed
Keyword(s):  
Cement Mortar ◽  
Plastic Properties ◽  
Cement Ratio ◽  
Lime Content ◽  
Setting Times ◽  
Water To Cement Ratio ◽  
Bond Strengths ◽  
Hardened Properties ◽  
Compressive And Flexural Strengths ◽  
The Relationship

AbstractIn this study, the effect of lime content (L %) on the plastic properties such as water-cement ratio (w/c), setting times, flowability, compressive, flexural and bond strengths of cement mortar were investigated. Based on the information in the literature the amount of lime varied between 0 to 45% (by weight of cement). The experimental results were compared with the data collected from different research studies and quantified using two different models. The plastic and hardened properties of the cement mortar modified with different percentage of lime were conducted according to the ASTM and BS standards. Based on the literature data the water to cement ratio (w/c) ranged between 0.3-0.74 percent, the w/c of 0.5 was selected in this study. The compressive and flexural strengths of cement mortar modified with lime up to 28 days of curing were ranged between 3 MPa to 65 MPa and 2 MPa to 12 MPa respectively. The compressive, flexural and bond strengths of the cement mortar decreased with increasing lime content. Vipulanandan correlation model was used to correlate the relationship between lime with consistency, setting times, flowability and compressive strength of cement mortar. Compressive and flexural strengths of cement mortar modified with lime were quantified very well as a function of w/c, lime content and curing time using nonlinear relationship.

Effect of Fly Ash and Lime Treatment on Mechanical and Swell Properties of Dunkirk Dredged Sediments

2011 ◽  
Vol 250-253 ◽  
pp. 755-760
Author(s):  
Dong Xing Wang ◽  
Rachid Zentar ◽  
Nor Edine Abriak ◽  
Wei Ya Xu
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Base Material ◽  
Lime Treatment ◽  
Dredged Sediments ◽  
Road Base ◽  
Base Materials ◽  
Dredged Materials ◽  
Strength Tests ◽  
Traditional Approaches

Traditional approaches such as ocean dumping and inland deposit are unsatisfactory for the management of dredged sediments, in the context of sustainable development. The solidified sediments with fly ash and lime as road base materials are preferred to conserve land and minimize impact to environment. A series of tests, such as compaction tests, tensile strength tests and swell tests, were performed to explore mechanical and swell properties of Dunkirk dredged materials. The fly ash contributes to the considerable increase in elastic modulus and the small increase in tensile strength in the presence of lime. Then the potential of treated sediments as road base material is evaluated. After immersion in water for 4 days, the addition of fly ash can induce a remarkable increase in swell percents in contrast with the lime-based sediments.

Joint Seal Practices in the United States: Observations and Considerations

1998 ◽  
Vol 1627 (1) ◽  
pp. 7-12 ◽  
Author(s):  
Dennis A. Morian ◽  
Shelley Stoffels
Keyword(s):  
The United States ◽  
Coarse Grained ◽  
Pavement Performance ◽  
Joint Movement ◽  
Rigid Pavement ◽  
Fine Grained ◽  
Rigid Pavements ◽  
Naturally Occurring ◽  
Local Experience ◽  
Performance Results

In recent years, states have adopted a wide variety of joint sealing practices for jointed rigid pavements, based on local experience. Over time, the adoption of quality control/quality assurance practices has resulted in decreased inspection and attention that ensure compliance with good joint seal installation practices. At this time, several agencies have adopted or are considering a policy of providing for rigid pavement joints by using a single 3-mm (1/8-in.) saw cut. Agencies are either leaving this saw cut unfilled or filling it with hot-poured sealant, recognizing that it is not effectively sealed. This practice may prove acceptable where positive drainage features are naturally occurring (coarse-grained subgrade) or where climates are very hot and dry, resulting in minimal joint movement. Other agencies continue to use established joint-sealing practices with good pavement performance results. This approach continues to be a prudent one, particularly in wet climates with fine-grained subgrade materials. Here slab-support erosion has been shown to result in accelerated deterioration of jointed rigid pavements.

scholarly journals Tests on workability and strength of high strength-flowable concrete containing PET waste fiber

2020 ◽  
Vol 7 (3) ◽  
pp. 115-139
Author(s):  
Sarkawt Karim ◽  
◽  
Azad Mohammed ◽  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fiber Length ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Time Increase ◽  
Fiber Volume ◽  
Split Tensile Strength ◽  
Pet Waste ◽  
Strength Tests

This study describes two workability tests, compressive strength and tensile strength tests of high strength flowable concrete containing plastic fiber prepared from polyethylene terephthalate (PET) waste bottles. For the high fluidity mix Vebe time and V-funnel time tests were carried out. Results show that there is a Vebe time increase with PET fiber addition to concrete being increased with increasing fiber volume and fiber length. V-funnel time was found to reduce when up to 0.75% fiber volume is added to concrete, followed by an increase for larger fiber volumes. When fiber length is increase, there is more time increase, but in general, V-funnel time increase was lower than that of Vebe time, indicating a different influence of PET fiber on the compatibility and flowability. The measured V-funnel time for all mixes was found to conform to the limits of European specifications on the flowability of self compacting concrete. Small descending in compressive strength was recorded for RPET fiber reinforced concrete that reached 15.74 % for 1.5 percent fiber content with 10 mm fiber length. Attractive results was recorded in split tensile strength of RPET fibrous samples which resulted in improvement up to 63.3 % for 1.5 percent of 40 mm fiber length content.

scholarly journals Strength Characteristics of M40 Grade Concrete using Waste PET as Replacement for Sand

2021 ◽  
Vol 18 (3) ◽  
pp. 209-218
Author(s):  
S.O.A. Olawale ◽  
M.A. Kareem ◽  
O.Y. Ojo ◽  
A.U. Adebanjo ◽  
M.O. Thanni
Keyword(s):  
Compressive Strength ◽  
Target Strength ◽  
River Sand ◽  
Split Tensile Strength ◽  
Natural Sand ◽  
Cement Ratio ◽  
Mix Proportion ◽  
Global Trend ◽  
Concrete Production ◽  
Free Environment

The wide variety of industrial and domestic applications of plastic products has fuelled a global trend in their use. The vast amount of plastic items that are discarded after use, on the other hand, pollutes the environment. In light of this, the current study  investigated the use of Polyethylene Terephthalate (PET) as substitute for natural sand in concrete production. Locally sourced river sand was replaced with industrially ground waste PET in proportions of 4 to 20% at a step of 4% by the weight of natural sand whereas other concrete constituents (cement, granite, water-cement ratio and superplasticizer) were kept constant. A Grade M40 concrete with a mix proportion of 1:1:2:0.35 (cement: sand: granite: water-to-cement ratio) was used for all concrete mixes.  Concrete without PET represents the control. Fresh (Slump) and hardened (compressive, split tensile and flexural) properties of the produced concrete were assessed using standard testing methods. The results showed that the slump of concrete decreased by 1.8% and 12.5% with an increase in PET content from 0 to 20%. The 28-day compressive strength of concrete containing PET was lower than the control. However, concrete with 4% PET compared considerably well with control with the compressive strength value exceeding the target strength of 40 N/mm2 while concretes containing PET beyond 4% had compressive strength below the target strength. The split tensile strength of concrete containing 4% PET was higher than that of the control but exhibited lower flexural strength than the control at the age of 28 days. It was concluded that the reuse of PET as a substitute for natural sand as an alternative waste disposal solution for eco-friendly concrete development and attainment of a pollution-free environment is viable.

scholarly journals Crack Mechanism of Different Concrete Grades under Compressive Loading: Application in Rigid Pavement

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Joseph O Oyedepo ◽  
Temitope Dada ◽  
Segun Aladegboye ◽  
Akintayo Adeniji
Keyword(s):  
Crack Width ◽  
Heavy Traffic ◽  
Compressive Loading ◽  
Type A ◽  
Traffic Volume ◽  
Hardened Concrete ◽  
Type B ◽  
Rigid Pavement ◽  
Rigid Pavements ◽  
Type C

The growth of cracks in concretes under different loadings in various structures and their consequent diminishing effect on the lifespan of structures is an age long structural problem. This research investigates the influence of compressive loading on the crack mechanism of different concrete grades 1: 1  : 3 (M20), 1: 2: 4 (M15) and 1: 3: 6 (M10) using three brands of cements available in Nigeria namely Dangote (Type A), Elephant (Type B) and Bua (Type C). Particle Size Distribution (PSD), Aggregate Crushing Value (ACV), Aggregate Impact Value (AIV) was carried out on aggregates in accordance with relevant codes while; compressive test were performed on the hardened concrete while, the crack width was measured using microscopic technique. A Coefficient of uniformity (Cu) of 4.00, AIV of 46 % and an ACV of 47.7 % were obtained for the aggregate which are suitable for rigid pavements construction. Maximum compressive strength value of 24.96 N/mm2, 24.67 N/mm2 and 24.89 N/mm2 respectively was obtained for concrete M20 for Type A, Type B and Type C cement at the 28 day.  A corresponding crack width of 0.97 mm, 0.89 mm and 0.93 mm was obtained while; a yield period of 57.66 sec, 58.33 sec and 53.33 was obtained respectively. Comparing with the International Organization for Standardization, concrete grade M20 any of the cement types is suitable for the construction of rigid pavements with heavy traffic volume while M15 is recommended for low traffic volume.

scholarly journals Development of new „Catalogue of typical flexible and semi-rigid pavement structures”

2014 ◽  
Vol 13 (4) ◽  
pp. 127-136 ◽  
Author(s):  
Józef Judycki ◽  
Piotr Jaskuła ◽  
Marek Pszczoła ◽  
Mariusz Jaczewski ◽  
Dawid Ryś ◽  
...  
Keyword(s):  
Road Traffic ◽  
Rigid Pavement ◽  
Pavement Materials ◽  
Motion Data ◽  
Rigid Pavements ◽  
University Of Technology ◽  
Pavement Structures ◽  
Data Design ◽  
Research And Design

This publication describes research and design works which were conducted at the Gdansk University of Technology for the purpose of development of new catalogue of typical flexible and semi-rigid pavement structures. The studies included: standardization of pavement structures terminology, study of foreign pavement structures catalogues and design methods, analysis of fatigue criteria for design of flexible and semi-rigid pavements, analysis of road traffic, based on weight in motion data, design of subgrade improvement, incorporation of new pavement materials, recycled and anthropogenic materials, determination of mechanistic parameters of materials and design of pavement structures using mechanistic-empirical methods of pavement design.

Sign in / Sign up

Export Citation Format

Share Document