Properties of fresh and hardened concrete pdf

Any further distribution of this work must maintain attribution to the author s and the title of the work, journal citation and DOI. Tarun et al. The results showed it obtained day strengths up to 62 MPa. Kumar et al. Coarse aggregate used in this study was prepared according to BS EN [20].

Munir et al. CF was incorporated in the SCC mixture at various percentages of 0. Its length was varied from 12 mm to 20 mm long. These various percentage was chosen based on study by Sureshkumar et al.

It was found that 0. Table 1 shows the mix design of SCC without addition of coir fiber. Coir fiber was added in SCC in the range of 0. Table 1. Mix Design of SCC. Results and discussions 3. Slump Flow Slump flow, S is determined by using the formula in Equation 1. Dmax is the maximum diameter of the flow spread while the dperp is the diameter of perpendicular direction.

Meanwhile, from the T recorded, it is shown that the time recorded increased as the percentage content of CF increased. This is in good agreement with the investigation conducted by Mohamad et al. From Figure 1, the highest value for slump flow was mm with T at 2 seconds but for SCC with addition of 0. This is because CF is organic material which has high water absorption; thus, increased the hydration process of SCC and generate the cohesiveness between the particles.

From the results recorded, the optimum percentage of coir fibre is 0. The average of the differences in height at four direction will determine the height of flow, Bj, as shown below. Note: When super plasticizers are used, the fresh concrete stays workable for only a short period of time 30 min to 60 min , which is why they are usually added at the site. Retarding concrete admixture: Used to delay the initial set of concrete.

Why do we use them? Allow for unusual placement or long haul distances. Note: The use of retarders must be evaluated experimentally before incorporation in mix design. Calcium Chloride is the most widely used accelerator. Initial and final set times reduced. Classification based on chemical and physical properties. Have hydraulic cementing properties Example: blast furnace slag, natural cement and hydraulic hydrated lime. Addition of pozzolan could make the hydrated lime into a cementitious material.

Class N: Raw or calcinated natural pozzolans, e. Other admixtures are available to improve concrete quality in a number of ways, such as workability agents, bonding agents, etc. Quality Effect Measure.

Water Fly ash reduces water requirements Requirements Silica fume increases water requirements. Fly ash and silica fume reduce air content Air Content It can be avoided by increasing air entrainer. Fly ash, ground slag, and inert materials generally increases Workability workability. Silica fume reduces workability; compensate by using super-plasticizers. Fly ash reduces heat of hydration. Silica fume may not Hydration affect, but superplasticizers used with silica fume can increase heat.

Fly ash, natural pozzolans, and blast furnace slag increase Set Time set time; Can compensate by using accelerator. Strength Fly ash increases the ultimate strength but reduces rate of strength gain.

Silica fume has less effect on rate of strength gain than pozzolans. Drying shrinkage Low concentrations usually have single effect. High and creep concentrations of ground slag or fly ash may increase shrinkage. Silica fume may reduce shrinkage. Permeability and Generally reduced permeability and absorption. Sulfate Improved due to reduced permeability. Open navigation menu. Close suggestions Search Search. User Settings.

Skip carousel. Carousel Previous. Ppt for amity interview. Durability of concrete. Earth resistant design philosophy. Software analysis concepts. Clay Fly Ash Bricks. Burj khalifa. Listening skills in technical education. Corrosion of re bars. Internship Report. Related Books Free with a 30 day trial from Scribd. Related Audiobooks Free with a 30 day trial from Scribd.

Properties of Fresh and Hardened Concrete 1. Introduction: The potential strength and durability of concrete of a given mix proportion is very dependent on the degree of its compaction. It is vital, therefore, that the consistency of the mix be such that the concrete can be transported, placed, and finished sufficiently early enough to attain the expected strength and durability. Properties of Fresh Concrete: Significance: The first 48 hours are very important for the performance of the concrete structure.

It controls the long-term behavior, influence f'c ultimate strength , Ec elastic modulus , creep, and durability. It is not a fundamental property of concrete. However, it must not be assumed that the wetter the mix the more workable it is.

Ozgan, A. Ozturk, Optimization of the hardened concrete properties with GA Chicago. Staquet, L. D'aloia Schwarzentruber, R. Le Roy, F. Toutlemonde, SCC [94] Li Chen, Tai-Sheng Wang, Modeling strength of high-performance concrete casting prediction for the realization of prototype VHPC-precambered composite using an improved grammatical evolution combined with macrogenetic beams, Materials and Structures 40 9 — Engrg 24 3 — Roussel, M.

Geiker, F. Dufour, L. Szabo, Computational modeling [95] G. Trtnik, F. Popovics, J. Ujhelyi, Contribution to the concrete strength versus water— [65] N. Martys, C. Goel, R. Kumar, D. Paul, Comparative study of various creep and shrinkage pp. Spangenberg, N. Roussel, J. Hattel, J. Thorborg, M. Geiker, H. Stang, J.

Skocek, [98] F. Springer, , pp. Scheiner, C. Hellmich, Continuum microviscoelasticity model for aging basic [67] L. Martinie, N.

Roussel, Fiber reinforced cementitious materials: from intrinsic creep of early-age concrete, J. Chidiac, O. Maadani, A. Razaqpur, N. Giergiczny, M. Glinicki, M. Building Materials 23 6 — Clear, T. Bentz, A review of early-age properties of cement-based materials, Cement 32 pp. Hurd, Lateral pressures for formwork design, Concrete International 29 6 [] K.

Kovler, A. Bentur, Cracking sensitivity of normal and high strength concretes, 31— ACI Materials Journal 6 — Billberg, Form pressure generated by self-compacting concrete, Proceedings of [] M.

Briffaut, F. Benboudjema, J. Torrenti, G. Makaratat, C. Jaturapitakkul, T. Laosamathikul, Effects of calcium carbide [] I. Engineering 35 4 — Mendis, G. Lukey, Engineering properties of [] J. Limeira, L. Agullo, M. Etxeberria, Dredged marine sand in concrete: an inorganic polymer concretes IPCs , Cement and Concrete Research 37 2 experimental section of a harbor pavement, Construction and Building Materials — Mazaheripour, S.

Ghanbarpour, S. Mirmoradi, et al. Engrg 22 9 — Etxeberria, E. Taha, G. Nounu, Properties of concrete contains mixed colour waste recycled — Mohammadi, S.

Singh, S. Sivakumar, M. Santhanam, Mechanical properties of high strength concrete Journal 3 Evangelista, J.

Sahmaran, I. Cachim, Mechanical properties of brick aggregate concrete, Construction and — Building Materials 23 3 — Sata, C.

Jaturapitakkul, K. Siddique, G. Noumowe, Effect of used-foundry sand on the product materials on mechanical properties of high-strength concrete, Con- mechanical properties of concrete, Construction and Building Materials 23 2 struction and Building Materials 21 7 — Barbhuiya, J.

Gbagbo, M. Russell, P. Salas, S. Delvasto, R. Lange, Comparison of two processes for [] I. Guerra, I. Vivar, B. Llamas, A. Juan, J. Kan, R. Tabsh, A. Ganesan, K. Rajagopal, K. Thangavel, Rice husk ash blended cement: strength properties of concrete, Construction and Building Materials 23 2 assessment of optimal level of replacement for strength and permeability — Eren, K.

Construction and Building Materials 23 2 — Siddique, J. Bilir, T. Keppert, Z. Sedlmajer, R. Yang, S. Millard, M. Soutsos, S. Barnett, T. Composites 30 4 — Binici, O.

Aksogan, E. Kaplan, M. Hossain, S. Shrestha, J. Limbachiya, Bulk engineering and durability properties of washed deteriorations, Construction and Building Materials 24 8 — Kourounis, S. Tsivilis, P. Tsakiridis, G. Papadimitriou, Z. Tsibouki, Properties — McNally, M.

Richardson, The effect of a new generation surface- ment 29 8 — Ohno, T. Sugiyama, T. Sugamata, A. Morsy, S. Alsayed, M. Engrg 19 — Richardson, Corrosion inhibitors for steel in concrete: state-of- [] S.

Kou, C. Poon, Properties of self-compacting concrete prepared with the-art report, Construction and Building Materials 22 4 — Laukaitis, J. Keriene, M. Kligys, D. Mikulskis, L. Brouwers, A new mix design concept for earth-moist concrete: of autoclaved aerated concrete materials, Science-Medziagotyra 16 3 a theoretical and experimental study, Cement and Concrete Research 38 10 — Chindaprasirt, S.

Hatanaka, T. Chareerat, N. Mishima, Y. Yuasa, Cement paste [] F. Debieb, S. Materials 22 5 — Aquino, M. Inoue, H. Miura, M. Mizuta, T. Okamoto, The effects of limestone [] L. Tang, Y. Lo, A. Nadeem, Mechanical and drying shrinkage properties of [] A. Teymen, O. Karahan, F. Bilim, M.

Chen, C. Paultre, K. Cusson, S. Sancak, Y. Sari, O. Simsek, Effects of elevated temperature on compressive [] E. Ozbay, A. Oztas, A. Baykasoglu, H. Ozbebek, Investigating mix proportions of strength and weight loss of the light-weight concrete with silica fume and high strength self compacting concrete by using Taguchi method, Construction superplasticizer, Cement and Concrete Composites 30 8 — Domone, A review of the hardened mechanical properties of self-compacting [] A.

Castel, T. Vidal, R. Kheder, R. Al Jadiri, New method for proportioning self-consolidating [] M.