Days Of Concrete Age Research Articles

Effect of Adding Polypropylene Plastic Waste on Compressive Strength and Flexural Strength Concrete

Indonesia is the second largest producer of plastic waste in the world after China with an annual contribution of 187.2 million tons of plastic waste. This study aims to analyze the effect of the addition of plastic seeds with polypropylene substitution on the compressive strength and flexural strength of concrete with the intention of reducing waste waste and utilizing it as a concrete mixing material and making concrete properties into green concrete. The method used is the experimental method by making several variations of concrete mixtures with plastic seeds of polypropylene type as a substitute for part of the sand. The mixing of plastic seeds is divided into several variations, namely, 3% polypropylene seeds and 6% polypropylene seeds. Analysis of the test results of the addition of polypropylene seeds compared to the concrete mixture without polypropylene seeds resulted in a compressive strength of 24.14 MPa for the addition of 3%, as well as a value of 23.25 MPa for the addition of 6% each at 28 days of concrete age. As for the flexural strength, an increase value of 0.16 MPa was obtained for the addition of 6% and the addition of 3% at the age of 28 days. This study shows that the results of the study have reached the planned quality target, namely the quality of fc'20 Mpa.

The Influence of Concrete Age on the Accuracy of Pile Integrity Testing on Bored Piles Foundation

Abstract Bored pile foundations are defined as deep foundations in the form of an elongated tube with a specific diameter made of reinforced concrete installed using the drilling method and in-situ casting concrete. The cast in-situ process in bored holes with a deep elevation below the ground surface can potentially cause integrity problems, such as voids, segregation, fracture, necking, bulging, and other concrete defects. Currently, many non-destructive test methods are available to ensure the quality of the bored pile; one is the Low Strain Integrity Testing method, also known as Pile Integrity Testing (PIT). ASTM recommends that PIT should be carried out no sooner than 7 days after casting or the strength of the concrete has reached a minimum of 75,0% of its design strength. In fact, the PIT test is carried out before the concrete’s age and/or its strength is achieved, considering the limited construction time. This could lead to misinterpretation of the PIT test results and inaccurate identification of the bored pile defect locations. The study aims to determine the effect of concrete age on the accuracy of bored pile defect locations on a laboratory scale. The test model consisted of four bored piles with a diameter of 0,3 meters and a depth of 2,0 meters, which were cast using reinforced concrete with a design strength of fc’ 30 MPa. The PIT was performed at <7, 14, and 28 days of concrete age, and then the confusion matrix method was used to create a binary classification model to determine the accuracy of the defect location. The defect locations were visually observed and validated by dismantling the test model after 28 days of casting. The results showed that the accuracy of identifying the location of concrete defects was not affected by the age of the concrete but was determined by the compressive strength of the concrete during testing. Referring to the F-score, bored piles with concrete strength >75,0% of the design accurately identify defect locations above 84,21%. On the other hand, bored piles with concrete strength <75,0% design resulted in accuracy below 66,67%.

Pengaruh Penggunaan Silica Fume Sebagai Bahan Tambah Pada Beton Alir

Concrete is a material that is commonly used when doing construction work today. Because concrete has several advantages when compared to other materials, such as being easy to form, resistant to weather changes, has high compressive strength, and is durable. In this study the use of Silica Fume as an additive to flow concrete has the function of improving the quality of flowing concrete. Silica Fume has an important role in affecting the chemical and mechanical properties of concrete. Judging from its chemical properties, Silica Fume geometrically fills the voids between cement materials, and causes the pore diameter to decrease and the total pore volume to decrease. Meanwhile, from its mechanical properties, Silica Fume has a pozzolanic reaction (a material containing silica/silica dioxide and alumina compounds) which reacts to the limestone released by the cement. The aim of the research is to increase the maximum compressive strength of flowing concrete by using Silica Fume added with varying percentages of 0%, 5%, 6%, 7.5%, 9%, 10.5% and 12% and using a superplasticizer of 1.5 %. From the results of the research conducted, it was found that flowing concrete with added silica fume on concrete compressive strength was able to reach 7.5% at 7 days of age of 25.91 MPa and at 28 days of concrete age was obtained at 26.19 MPa.

Comparison of the performance of class-C and class-F fly ash concrete mixtures produced with crushed stone sand

The use of fly ash as partial replacement of cement in the production of environmentally-friendly concrete is now an established fact. This study investigated the effects of class-C and class-F fly ash at 20 wt% replacement of Portland cement (PC) on the strength and durability characteristics of concrete mixtures incorporating crushed stone sand as fine aggregate. Experimental investigations were carried to compare the effects of class-C and class-F fly ash as partial replacement of cement on the rheology, compressive strength, moisture sorption, abrasion resistance, and microstructural characteristics of the resulting concrete mixtures at various concrete ages.Test results showed that the use of class-C fly ash lowers the workability (slump value) by 26% and entrained air by 33% of the fresh concrete, while the class-F fly didn’t not affect these characteristics when compared with that of control mixture. On the other hand, the use of class-C and class-F fly ash enhanced the later age compressive strength of the resulting mixtures by 23% and 35%, respectively in comparison to control concrete mixture. At 56 days of concrete age, 20% and 29% reduction in the 8-day cumulative moisture sorption and 14% and 19% reduction in mass loss due to abrasion of class-C and class-F based concrete mixtures, respectively, was recorded as compared to that of control mixture. Scanning electron microscopic (SEM) analyses showed enhancement in the microstructure of the concrete mixtures as results of the inclusion of fly ash as partial replacement of PC. Test results also showed superior performance of class-F fly ash on the strength and durability characteristics of resulting concrete mixture as compared to class-C fly ash at equivalent replacement level. The outcome of this study provides insight into the comparative performance of class-C and class-F fly ash based concrete mixtures in fresh and hardened states.

Strategies to enhance the moisture-barrier qualities of concrete mixtures to improve their durability

Moisture transport in concrete significantly impacts its durability attribute, which in turn affects the useful service life of the built concrete infrastructure. A host of physical, chemical, and mechanical deterioration processes of concrete depend on the presence of moisture inside the concrete. Enhancement of the moisture-barrier characteristic of concrete can thus be the key to improving its durability. This paper reports the test results of various strategies implemented to reduce the moisture transport into concrete. These strategies include (i) use of fly ash and silica fume as partial replacement of cement for refinement of capillary porosity, discontinuity of pores, and refinement of the chemistry of hydrated cement matrix; (ii) use of milled waste glass as partial replacement of cement to refine the microstructure of cementitious mixture (iii) use of hydrophobic additives to reduce the affinity of capillary pore surfaces to moisture; and (iv) use of polymer emulsion to line capillary pore surfaces to cause partial blockage of the capillary pore system. Five different concrete mixtures including a control mixture were prepared using the above formulations and tested for moisture sorption, acid attack resistance, abrasion resistance, and compressive strength characteristics at 28 and 90 days of concrete age. Test results indicated enhancement in compressive strength, moisture resistance, and other durability characteristics of the modified mix formulations compared to that of control mixture. Mix formulation incorporating fly ash and silica fume as partial replacement of cement proved to be the most effective combination for achieving the desired improvements in mechanical and durability attributes of concrete. The findings of this study are expected to provide guidelines for designing concrete mixtures with enhanced durability when exposed to aggressive environmental conditions.[copyright information to be updated in production process.]

Andesite waste powder as mineral admixture in concrete: A Review

Massive production of andesite natural stone causes environmental problems due to the large amount of powder waste produced. Andesite stone contains a high percentage of SiO2 which indicates its possibility to be used as a mineral additive for concrete. Research that has been conducted by researchers from various countries shows that andesite stone has fine grains with a specific gravity of 2.66 - 2.68, Loss on Ignition 2.37 - 3.38, has a content of SiO2+Al2O3+Fe2O3>70% which can be classified as fly ash type F based on ASTM 618-92a. The use of andesite stone powder waste as a partial replacement of cement in concrete showed that concrete properties improved at an optimum of 10% at 28 days and 90 days of concrete age, respectively. The use of andesite waste powder in larger quantities showed a decrease in concrete properties. The use of andesite powder waste in concrete is recommended to reduce the impact of waste on the environment as well as to reduce the use of cement in concrete as an effort to support sustainable and more environmentally friendly construction.

STUDI SUBSTITUSI PEMANFAATAN ABU CANGKANG KEMIRI SEBAGAI PENAMBAHAN AGGREGAT HALUS TERHADAP KUAT TEKAN BETON Fc’ 14,53 MPa

Concrete is a mixture of portland cement or other hydraulic cement, coarse aggregate, fine aggregate and water, with or without additives that form a solid mass (SNI-03-2847-20020). This research is to find out the compressive strength of environmentally friendly concrete by utilizing the results of burning candlenut shells as a new alternative to obtain concrete obtained from waste bark. The method used is a quantitative method with research in the Civil Engineering laboratory of the University of Muhammadiyah, West Sumatra. The purpose of this study is to find out how much influence candlenut shell ash has as a partial replacement of fine aggregate on the compressive strength of concrete and to find out how much influence candlenut shell ash has as a partial replacement of fine aggregate with a percentage of 0%, 10%, 15%, and 20%. of the weight of the fine aggregate. Benefits of the research Provide knowledge on the use of candlenut shell ash as a partial replacement for fine aggregate in the manufacture of concrete. From the results of the study, it can be concluded that the mixture of concrete with hazelnut shell ash fc' 14.53 occurred at an additional 10% percentage at 28 days of concrete age, namely 8.87 MPa, 15% percentage at 28 days concrete age of 14.53 MPa, while in the percentage of 20% at the age of 28 days of concrete is 12.46 MPa.Keywords: 12,53 MPa quality of concrete , compressive strength, candlenut shell ash.

Long-term field performance of concrete produced with powder waste glass as partial replacement of cement

This paper reports the long-term field and laboratory-tested performance of concrete produced with 20 wt% replacement of cement with powder waste glass (WG). Field investigations of WG concrete were carried out in a large-scale field project comprising of various segments subjected to harsh weathering conditions and service load over a period of about three years. While laboratory cured WG concrete and normal concrete specimens were tested in compression and flexure at various concrete ages ranging from 3 days to 300 days. After about three years of field exposure, concrete cores were extracted from various segments of the project and tested for compressive strength, moisture sorption, and abrasion resistance. A detailed survey of the various segments of the project was carried out to physically examine the state of WG concrete after three years of service. Test results of the field WG concrete showed enhanced compressive strength, up to 57% reduction in moisture sorption and up to 61% reduction in abrasion weight loss in comparison to normal concrete at 300 days of concrete age. Similarly, the laboratory tests showed 43% gain in compressive strength and 28% gain in flexural strength of WG concrete in comparison to that of normal concrete at 90 days of concrete age. Detailed physical examination of various project segments showed no signs of deterioration or material failure after three years of service. The field project also demonstrated the constructability of WG concrete similar to that of normal concrete.

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

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%.

Analisis Kuat Beton Geopolimer Menggunakan Fly Ash dan Abu Sekam Padi

One of concrete construction development is the use of geopolymer concrete which is environmentally friendly and efficient in regard to energy utilization. In this study, four combinations of fly ash (FA) and rice husk ash (RHA) was used, namely: i) 100% FA and 0% RHA, ii) 75% FA and 25% RHA, iii) 50% FA and 50% RHA, and iv) 25% FA and 75% RHA, with addition of alkaline solution mix of Na2SiO3 and NaOH with a ratio of 5:1 at 7 days, 14 days, and 28 days of concrete age, with cube samples and will be done a compressive strength test of 225 kg/cm2 (28 days of concrete age). This study aims to determine the optimum variation and analyze the compressive strength of geopolymer concrete using FA and RHA with the addition of an alkaline solution of Na2SiO3: NaOH = 5: 1. Results found that the optimum variation was in the geopolymer concrete mix of 100% FA and 0% RHA with a compressive strength value of 395.643 kg/cm2 (28 days of concrete age), whereas other variations have shown a decrease of compressive strength compare to the normal concrete. Therefore, the geopolymer concrete variation of 100% FA and 0% RHA has a higher compressive strength because the cement substitute used (100% fly ash) contains the right chemical composition in which it can react with alkaline solutions properly. Meanwhile, rice husk ash contains a composition that is not appropriate to be reacted with alkaline solutions. This shows that fly ash is a suitable substitute for cement for geopolymer concrete. In the other hand, rice husk ash is not suitable for use as a substitute for cement in geopolymer concrete.

Penambahan Serbuk Kayu Kamper terhadap Kuat Tekan Beton

Sawdust waste from the furniture industry should be considered. Nowadays, the increased demand for furniture is in line with the increase in sawdust waste produced. Therefore, it is necessary to make use of sawdust to protect environment. An alternative use is the addition of sawdust as the concrete mixture. Cellulose and hemicellulose compounds are compounds contained in wood powder, where these compounds can provide additional bonding between particles in the cement and sand mixture in concrete. Therefore, concrete can be stronger as well as more water resistant, hence it can be used for a specific purpose in constructions. This study aims to analyze the compressive strength of concrete due to the addition of sawdust as an organic fiber in the concrete mixture with the percentage of 0.25%, 0.50%, 0.75% and 1% as substitution of sand. Organic fibers as additives in concrete are being developed until recently. The proposed concrete was 25 MPa quality. Result showed the increase in the compressive strength of concrete by 0.98% in 1% wood powder mixed at 28 days of concrete age.

Enhancement of self-healing to mechanical properties of concrete

Concrete is the main construction material of many structures. Exposing to loads creates cracks in concrete, which reduce the performance and durability. The decrease of concrete cracks becomes a necessity demand to ensure more durability and structural integrity of the concrete structure. Autogenous healing concrete is a kind of new smart concretes, which has the ability to reclose its cracks by means of itself. Concrete self-healing is a type of free repairs processes, which is reduce direct and indirect cost of maintenance and repairing. This work targets to inspect the mechanical properties of concrete after using two combinations of two materials (20 kg/m3 calcium hydroxide Ca(OH)2 and 2 kg/m3 sodium carbonate Na2CO3 and 30 kg/m3 calcium hydroxide and 3 kg/m3 sodium carbonate) as a partial replacement of cement to work as self-healing agents. The paper reports and study the compressive, flexural and splitting tensile strengths and ultrasonic pulse velocity tests’ results at 7, 28 and 90 days of concrete age. Use of two combinations of calcium hydroxide and sodium carbonate, as healing agents, enhanced the mechanical properties of concrete and reduced the width of concrete cracks with time. The concrete compressive strength was increased after curing for 90 days by 9.3 and 11.1 %, respectively. The flexural strength was improved by 14.3 and 15.9 %, respectively. Also, the splitting tensile strength was enhanced by 6.9 and 9.3 %, respectively.

Characteristics of Recycled Aggregate Concrete Produced with Crushed Stone Sand as Fine Aggregate

In this work the characteristics of recycled aggregate concrete produced with crushed stone sand as 100% replacement of desert stone were experimentally investigated. Concrete mixtures incorporating varying percent replacement of normal aggregate with recycled aggregate as coarse aggregate and crushed stone sand as fine aggregate were produced and tested at 7, 28, 56 and 90 days of concrete age for various hardened concrete properties. For one-on-one comparison, corresponding recycled aggregate concrete mixtures using desert sand as fine aggregate were also tested. Superior performance of crushed stone sand-based concrete mixtures was recorded for compressive and flexural strengths, static modulus of elasticity, abrasion resistance and water absorption characteristics when compared with that of the corresponding recycled aggregate concrete mixtures produced with desert sand as fine aggregate. No significant effect of crushed stone sand was recorded on the split tension strength of concrete mixtures. Improvement in mechanical properties and water absorption characteristics of crushed stone-based mixtures was, however, observed up to 50 wt.% replacement level of normal aggregate with recycled aggregate. Beyond this level of replacement, no noticeable difference in the performance of the two categories of recycled aggregate concrete mixtures was recorded. It is concluded that crushed stone sand can be effectively used as fine aggregate replacing desert sand to avoid the limitations caused in the mechanical properties of recycled aggregate concrete mixtures due to the use of desert sand as fine aggregate.

Influence of magnetic field treated water on the compressive strength and bond strength of concrete containing silica fume

The overall objective of this study is to investigate the effect of magnetic field treated water and silica fume content on the compressive strength and bond strength of concrete. A total of ninety specimens were cast and tested under compression and pullout tests. In order to fully understand the concrete strength development, both tests were carried out at 7 and 28 days of concrete age. Normal water and magnetic water were used in the mix using different silica fume content. The results showed significant increase in the compression strength when magnetic water was used regardless of the silica fume content. Specimens prepared with magnetized water showed an increase in the bond strength compared to those prepared with normal water at all silica fume contents. The results also showed the use of high content of silica fume reduces the bond strength due to the reduction in adhesive properties between steel and concrete. The ultimate pullout load for 16 mm diameter bar was larger than that for use of larger than that for the 12 mm bar size but the bond strength of the larger diameter bar size is smaller since it has larger surface embedded area. The effect of silica fume on bar size illustrated that for a smaller bar size a lower development of bond strength is recorded because the distribution of silica fume particles around the small surface area reduces the adhesion forces between concrete and steel bars. Finally, as expected, the results showed that age of concrete has significant influence on the bond strength. The main contribution of this work is to prove that magnetic field treated water can enhance not only the compressive strength of concrete but also the bond strength between steel bar and concrete.

Performance-Based Approach for Deciding Concrete Age for Healer Sealer Application on New Concrete

Healer sealer application is one of the capital schedule maintenance (CSM) activities for enhancing concrete bridge deck durability and extending the service life. A healer sealer is expected to seal the cracks and reduce the rate of chloride ion ingress. Highway agency policies and manufacturer specifications require maintaining a total of 28-day curing period (7-day wet and 21-day dry curing) before the application of a healer sealer on bridge decks with new concrete in patches and repairs. Consequently, the contractors have to wait for 28 days to apply a healer sealer. Delaying application time increases project completion time and cost of construction and mobility. This paper presents a performance-based approach for evaluating the possibility of reducing the 28-day waiting period for healer sealer application on bridge decks with new concrete. An experimental program was developed and executed to evaluate the impact of healer sealer application parameters on crack sealing ability. A healer sealer was applied at 14, 21, and 28 days of concrete age. The treated surface was ponded with 3% NaCl. The performance of the treated concrete was evaluated using the acid-soluble chloride content test. The results showed the possibility of applying a sealer before the end of the 28-day curing period stipulated in the current specifications. The performance-based approach presented in this paper can be used to identify the age of concrete for healer sealer application.

Redistribution of corrosion products on steel bar/concrete interfaces in repaired concrete under influenced of aggressive ions

The important cases contribute to deterioration of reinforced concrete structure were due to corrosion attack to the reinforcing steel bar. Instead of penetration of aggressive ions for example chlorides, sulphates, acids and others; the selection of materials used for repair should be concern as well. Due to this factor, the understanding on the electrochemical behavior of reinforcing steel bar using different materials for repairing for deteriorated concrete structures will be considered. To understand this phenomenon, the ready-cast specimens mixed with chloride as prepared earlier will be demolished at 301 days of concrete age. Surprisingly, potential measurement of reinforcing steel bars was reoriented to a lower corrosion risk at 301 days of concrete age. The chemical and microstructural factors related to corrosion products were quantitatively identified and correlated it using electrochemical measurements results. For corroding reinforcing steel bar by fully and partially influenced of chloride ions, the corrosion products were mainly contained wuestite, magnetite and lepidocrocite confirmed by XRD patterns. Depending on morphology and multi-elemental content, it shows that chloride ion is approaching the reinforcing steel bar that lead to greater corrosion rate in Reference specimen compared to repaired ones. However, the existence of Ca(OH) in the vicinity between concrete/reinforcing steel bar helps to prevent further corrosion attacks

PENGARUH METODE PERLAKUAN DALAM PERAWATAN BETON TERHADAP KUAT TEKAN DAN DURABILITAS BETON

Concrete strength is influenced by several variables, among others by its constituent material, mix design, workmanship, and curing. The objective of concrete curing is to maintain the concrete in certain conditions after the dismantling of the formwork hence the optimization of concrete strength can be achieved close to the designed strength. This study aims to determine the effect of concrete curing on its compressive strength. Designed concrete compressivestrength of 20 MPa with slump values of 60-100 mm to be used. The specimens are cube-shaped with 15 cm dimension. Concrete compressive strength tests were conducted at 28 days and 56 days of concrete age. The types of concrete curing consist of 9 variations, i.e., not treated, water immersed and water sprinkling. Optimum 28 days age of compressive strength of concrete obtained from specimens that immersed in fresh water, which was 31,3 MPa. The concretespecimens that were put outdoor without any curing and treatment generates second highest compressive strength value of 28.6 MPa. The 28 days age of concrete compressive strength values cured with water sprinkling with addition of burlap wrapping are still under the compressive strength of uncured concrete. Significant changes to the strength of cured concrete occurred at age of 56 days and uncured concrete strength decreased up to 19%. The optimum increase occurred in concrete cured with burlap sack wrapping and water sprinkling that was conducted routinely for 3 days by 27,84%. With increasing age (durability) the treated concrete has better strength.

Evaluation of Steel Industrial Slag as Partial Replacement of Cement in Concrete

Cement is the most important ingredient in concrete, which acts as a binding material. It is evaluated that cement is the second largest industrial source of CO2 on earth. This demands a partial or full replacement of cement by an environment-friendly material. In this research industrial waste slag from a local Steel Mill, namely Mangla Metals was selected as possible replacement of cement. Some preliminary standard tests conducted on the slag showed its strong chances to be used as pozzolana. Slag used for this study was reduced to the particle size passing through ASTM standard sieve #100. Concrete specimens containing 10% and 20% replacement of cement by slag were prepared. The mechanical properties like compressive, split cylinder tensile and flexure strength were determined as per standard ASTM methods. Tests were conducted at 3, 7 and 28 days of concrete age. Results show a decrease of 14% in compressive strength, 7.5% in tensile strength and 10.5% in flexure strength for 10% replacement vis-à-vis control specimens at 28 days. For 20% replacement, the decrease in compressive, tensile and flexure strength are 25.5%, 29%, 31% respectively. Additionally, ASTM standard strength activity index test with finer slag particles passing through ASTM sieve #200 provided compressive strength more than that of control specimen. Based on the results, it is concluded that the industrial slag has the potential to partially replace the cement if slag is ground to the particles, passing through ASTM sieve #200. This could lead to a huge reduction of cement quantity in concrete and the environmental burden due to deposition of waste slag in landfills.

Study of the Mechanical Properties of Jute Fiber Reinforced Cement Composites

The study results show the use of jute fibers to develop a low cost material for wall panels, roofs and other construction board. The study has been investigates the cement mechanical characteristics jute fibers reinforced concrete. Different lengths of fibers (2cm) and (4cm) were mixed to act as reinforcement for the concrete samples. The samples with different fiber percentages (0.5%, 1% and 1.5% by weight of cement) were tested in axial compression and splitting tensile strength. A total of (42) concrete cube samples (100mm*100mm*100mm) and (42) cylindrical samples (100mm*200mm) were used in the tests, these include compressive and splitting tensile strength and were conducted at (7) and (28) days of concrete age. The results showed that increasing the fiber content and length leads to a slight decrease (4.3% - 12.3%) in the compressive strength but it improves the splitting tensile strength which reached best value at the (1% by weight of cement) fiber content and (5cm) length. The increasing of splitting tensile strength was up to (19.4%) from the reference concrete strength.

Kajian Kuat Lentur Beton pada Perkerasan Kaku Jalan Tol Balikpapan-Samarinda

The Balikpapan - Samarinda toll road is one part of the trans Kalimantan toll road that arrived currently under construction. The construction of this toll road uses rigid pavement. Road construction This toll road by the East Kalimantan Provincial Public Works Department requires a minimum flexural strength of 45 kg / cm� for 28 days of concrete age. The purpose of this study is to study flexural strength concrete on the rigid pavement of the Balikpapan-Samarinda toll road based on the planning of concrete mixes at field. This study uses experimental methods in the laboratory. Credit samples are made based on concrete mix planning in the field and testing in the laboratory. The sample as many as 24 pieces for a cylinder size of 15 x 30, and 12 pieces for blocks measuring 15 x 15 x 60, which will remain at the age of 7, 14, 21 and 28 days. The results of the strong test on the cylinder is obtained at 382 kg / cm2, 27% bigger than planning, and flexural strength in the beam of 53.48 kg / cm2, 18% greater than requirements. So it can be concluded that the pavement work is rigid on the Balikpapan-Samarinda toll road Has been in accordance with the provisions stipulated by the East Kalimantan Provincial Public Works Department.