15 0 obj IS METHOD Step 1: f m =f ck + 1.65σ zThe standard deviations are: M10-M15: 3.5 MPa M20-M25: 4.0 MPa M30-M50: 5.0 MPa DETERMINE FROM SITE DATA, 30 CUBES B. Bhattacharjee DEPARTMENT OF CIVIL ENGINEERING, IIT DELHI endobj <> 2. 4 Method" DOE Method of Concrete Mix Design11.4 [ 11 0 R] Weight of Fine aggregate =790.3 kg/m 3. Concrete mix design is the process of finding the proportions of concrete mix in terms of ratios of cement, sand and coarse aggregates. CONCRETE MIXES The ACI Standard 211.1 is a “Recommended Practice for Selecting Proportions for Concrete”. Mix Design by Indian Standard Method: The bureau of Indian standards has recommended a procedure for mix design of concrete based on the experimental work carried out in the national laboratories. Choice of maximum size of aggregate Step 3. Table No13 is also approved by ministry and consultant of the kingdom and has set as standard for the required strength at 28 days till date September 2015. Selection of water/cement ratio Step 5. endstream specifically developed for concrete pavements, the DOE method is applicable to concrete for most purposes, including roads. Concrete mix design. All concrete mixes possess unique properties, the design process can be time-consuming and challenging. x��W�o7V)�a���JZ�S�� ��gl���ZU��RtR�>Ҫ�.��3��z�8�I�Jw�x���7��2ڂ2���ުY7h��F�� 蔂���7%x���_�=j�< ���z���6*m�Z��4��^Zct���>���i?�R�^l�q� �4�^�aL! endobj <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 17 0 R/StructParents 2>> <>/OutputIntents[<>] /Metadata 792 0 R>> Concrete Mix design of M5, M7.5, M10, M15, M20, M25, M30 and higher grades of concrete is calculated as below: The procedure for finding the different grades of concrete mixes are same. 13 0 obj StonemontQC is fully integrated with the aggregate portion allowing for mix component properties to be easily kept current with data from aggregate plants. ���~����?��mAÜL��I�[]�S_}Ů� �;��y��K2g��|�-��y14>����r��cI����� �fH�t�!����z`� ���䐖��Űt^��[eF�xZ~ Grading of the aggregate is presented in Figure 4. All aggregates are dry, absorbing 0.8 %, not crushed Step 1. For making trial -2, Weight of material required will be calculated for 4 no’s cube assuming 25% wastage. Concrete Mix Design Calculation : M20, M25, M30, M40 Grade Concrete Concrete mix design is a procedure of selecting the suitable ingredients of concrete and their relative proportions with an objective to prepare concrete of certain minimum strength, desired workability and durability as economically (value engineered) as possible. The contractor establishes the initial parameters for a mix design and serves as the starting point for subsequent proportioning calculations. earlier title 'Recommendedguidelines for concrete mix design'. x�}�Mk�@���s�nf6�� ��-�Jk=HE�XhJSK��;�j�W/ ;ϼ�Dw��D�l��v����=���FN#X�P�xlA��� bBh�-[��&@c ����� e����I��얻F���#�-�%�Z�.BT~;��^��6\��\=����i�^����J���tKE"�HTK����H[�.sv�.Bl4~.W ��=��;b/DtCkŴ|Y�/��*��4U�B�Z_j{.^�\foa[�rQ�0��O��1`\��C�5�R2���7����Ҕh��?nj83KNd4��o�M�(V���(�,�k�רWy�w��a����bU����TI��es�l��i.� 7*�� The Concrete Hub app, however, solves these challenges associated with creating a unique concrete mix. stream If there is an appreciable difference, the constituent contents will differ from those intended in the initial design. stream Slump and Kelly Ball testing would be performed to investigate workability of mixture. �u�E�^��E���������Q� �wC��-�b��ل�G�8�� �Z�\p��sQN i�Z}�ub=>�7~,#p� ���2�ft�Ǯ�z'�a��������v�ѻ�#$��1J�h��@3��3N��~��Ȗ�)����������:?�y{�Gع3�� 15 0 obj DOE with required cement type, water cement ratio, etc for a ( 1:2:4) reinforced concrete mix. endobj <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/StructParents 0>> American Concrete Institute Method of Mix Design (ACI–211.1) This method of proportioning was first published in 1944 by ACI committee 613. <> Choice of slump Step 2. 520 concrete mixes. :l?�a0���Jv���O���h�'�{�.m~^t;B�'�F��#w�!�|��a�3���!��������9V'D���6�>3C�e�#fFG&�����+y�Oot�)�Uv��'����x|�M%o=@y/�J�k�"no}��6|�5'G�B��>��rBa�a��� �|���w���5���&�&��C j�b�"��'F�l|�a@���0�o�r{��ɑ�aUƿ��ɣE* �����D�"����H�B:bMf��.Y�¬2(��G����,����n�d�{�"��C�n��IAr�$8� &�v�����{i@��P�'ټ����O �����2r!CsX�ڇ�fn��a?�tCr>;����f�EQ��b�m��9�$VZ�K��XFR%�=�i�H}/�Pvϫ�P�����|SN���[ t܄��M:���V�:�Z)`��W$�]�1@|�9$b���Ss���vt��U���C��C p��*�VI���;1�ѡ�$��QǱ)�|8��?A�9?C��fU���)�a�.�ӊk��VI\]�bt�&� �. )w��>�L� bN���w�Luq����WԞ�H���I�z�M��C�� ����m�P�`>o�~���F}���헧���/�l}j\6�D��F���\�(p���;��f#���"CZ��z�3�#5?��rNÏm� ��~���%�I ���Bk������G2�xl�Bh��і0 concrete mix designs. Weight of Coarse aggregate = 1073.33 kg/m 3. 3 0 obj Water-Cement Ratio The controlling factor for most of the desirable properties of concrete – things like strength, durability, shrinkage potential and permeability – is what’s known as the water-cement (w/c) ratio. <> 8 0 obj <> x��ZK�G���c+X����j��!v����c�=9�R�L'z�J����KVk٢����x�"��,U��Q�y��û����۷����U���t����X�c����ա����]���L�����hW�7��s>�~���@����L�Q�?2��_�~���PYe}�s��j]� T�й�|�;�c3�������-�y�"�~�E�WQ��V��f����l��ݔ���������^�+ �m$���Me������$�m�Ȼŝ/���|��GS�U:�����E�8P�r� ��-�ɢ=_>�Fw��-�c�n�[�S[-~���>���rH�sӠ�À���C��Z@��=v;����/� %\��5-Y�~KK����ETť�������f5�`"��U_��1U�N�BF�J�P?�Z�D:)��JeZ���Vb.Uw�����;N��f�k:��q�(�+�Y"��OpNFY[�>oN�W���'�T����!��K�e�]���E��w��jnv@T����I�GZO������)g����x��]�rd����������9`U�0���W�>6�����xeb}�(�ZNX��0+���1�[�-H��uG4�+��r���.��b����r��j�3��X�� hEV�@}�86m&l� 17 0 obj 5/2017 Page 3 of 17 Slum ps given in Table(1) may be increased when chemical admixtures are used, endobj 10 0 obj Practical Concrete Mix Design has been compiled to help readers understand the concrete mix design methodology, including formulas and tables involved in the pertinent steps. 3137 prior to completion of a mix design. <> Calculation of cement content-- Once the water x��TKo�@o��i��Jl��sE $ĥU$-��R����?`�&�lY�;R����o�8Kɂ� /�� ��.�I�!��q����w�yϞ���T�Or�@��l1�v�oؾ;7�����\���7?A���"e�ae��jN�Dہ�XY�f)�0*"���n-�I��* Ȕ��X�SAhX8)�9�c�pO��i���Ĵ�ۃ#�K�>���xa��3��hMF���0�┊O�s�t=y���]��u�K����"P��FףτPg�7�|a��nm��5XCI�������ٓ�wW�I4��'�!�K�G+��`�qwZY{�fU�w ���,(�!���e�h�=����� 1�K��g'ڽ? 9 0 obj Concrete Mix Proportions for Trial Mix 2. Adapted from ACI 309 In 1954 the method was revised to include, among other modifications, the use of entrained air. However the concrete mix design is done on every new project in the begging for accuracy. Weight of Water = 197.4 kg/m 3. <> g��z��_KNB�c|7�ː�x꽻{8=N@�$4���܈�ov.Z���w[nSҮ���>u�l���lSM��8ژA��N>�<1�r�M�69e̟;!e&�;~�Ԗ�����%)�u�X��;�b�V&�"FI��==.��a�UM��qڏT��vaR݆2e�H 5 0 obj 3. '���Mh� _s��r�ID8s� iO�j� 28. endobj endobj ;��x҇�}�y���T��h�>-X�zg�/� <> 14 0 obj This process is usually adopted for structures which requires higher grades of concrete such as M25 and above and large construction projects where quantity of concrete consumption is huge.. %PDF-1.4 The Concrete Hub app now provides an easy, fast, and free way to perform a preliminary mix design. x��YKoG����0X���Ӏ�Cl'���r0r���4���%�>_5���P5l�f/���z|U#��({����|�^|���e>�B�RJ��"h)��b��g?}#6�w�H镴��7��?�3���! 6 0 obj <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 8 0 R/StructParents 1>> Also used for lab test specimens. 2.1. 16 0 obj 2 0 obj 6 0 obj 4 0 obj Estimation of mixing water and air content Step 4. The mix design procedure is given in IS-10262- 1982. Calculation of cement content Step 6. 7 0 obj endobj c) Various requirements have been modified in line with the requirements of IS 456 : 2000 'Plain and reinforced concrete - Code ofpractice (fourth revision)'. The initial step in proportioning the mix design is to calculate the water content per cubic yard of concrete. StonemontQC includes a powerful concrete mix design and quality control software program for concrete producers. endobj Since DOE method presently is the standard British method of concrete mix design, the procedure involved in this method is described instead of out dated Road Note No 4 method. It is also helpful to have handy copies of the standards referenced in the project specifications and in ACI 318. concrete mix design procedure with new equipment, consensus target values, common laboratory procedures, and full integration with both structural design and field quality control – a lab of the future. b) The applicability ofthe standard has been specified for ordinary and standard concrete grades only. A minimum of two Concrete Hub’s Concrete Mix Design Tool. Concrete Mix Design and Quality Control Software Management System. endobj Concrete”, specifically Chapter 6, “Procedure” and Appendix 1, “Metric (SI) System Adaptation. Lab 1 – Concrete Proportioning, Mixing, and Testing Supplemental Lab manual Prepared By Mutlu Ozer Objectives Concepts Background Experimental Procedure Report Requirements Discussion Objectives Students make concrete according to the mix design. 5.2.2 Procedure for concrete mix design MIX DESIGN EXERCISE: Proportion a concrete mix with a 28 day compressive strength of 35 MPa and a slump of 90 mm, made with ordinary Portland cement with cement strength of 49,5 MPa. Z�gA���J�[�/F�Z;�B܈���D�{��|c������N��ꬓ_��yU�Y՛>*R�������Ah�9}�?�X���C���C��@:���Jh_Ke���PM�bt�?����j>{��F��[quK skj-�W�u�@6i���O���M��J��R}xܬ��A,��o���7����v��m?����g�����g���h�R��.sA���%T���]�6�L�x��&�.��5��I.�禾�����n2�2IA��o_��5� �rg3Z���䴻�VU�^��x��������Z�2u��s����4.lղ��f�-T�X��BUT#U��: ���!�v��v�?pV;�M�l�F72��[�s�я�9�^:t�Q. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability . endobj <> In these mixes the performance of the concrete is specified by the designer but the mix proportions are determined by the producer of concrete, except that the minimum cement content can be laid down. <> It really is as simple as it sounds. If mix designs are submitted for work specified by multiple design professionals (e.g., civil work) each design professional specifying concrete mixes should make it clear which mix designs they have reviewed. 5 0 obj endobj stream Weight of Cement = 384.8 kg/m 3. The concrete mix design involves various steps, calculations and laboratory testing to find right mix proportions. %PDF-1.2 �@A�x��^[ 5.3 MIX DESIGN METHODS 5.3.1 CONCRETE MIX DESIGN 1. 5-694.302 REQUESTING MIXES The Engineer shall submit information for concrete mix designs to the Mn/DOT Concrete Engineering Unit as soon as possible prior to the start of concrete operations. Mix Design Procedures ACI Mix Design Relationship between water/cement ratio and compressive strength of concrete 28-day Compressive Non-AE AE Strength (psi) 2,000 0.82 0.74 3,000 0.68 0.59 4,000 0.57 0.48 5,000 0.48 0.40 6,000 0.41 0.32 7,000 0.33---Mix Design Procedures ACI Mix Design 6. endobj 1 0 obj endobj {B��C�Q�?�㰝��Mu�*-h�S���6�N��%��b������@A���ع��e�q�� In 1970, the method of mix design became the responsibility of ACI committee 211. endobj <> Concrete Mix Design a nd Trail Mixes Execution TR No. FINISH a concrete mix. endobj 8.8.3 Adjustments to mix proportions (density) • Density After the density of the fresh concrete is measured, the resultant value is compared with the density value used during the design. Concrete that is stiff or dry may be difficult to Handle, Place, Compact, and Finish and, if not constructed properly, will not be as strong or durable when finally hardened. endobj concrete in thin members. stream Design of concrete mix needs not only the knowledge of material properties and properties of concrete in plastic condition, it also needs wider knowledge and 458 Concrete Mix Design" General" Concept of Mix Design" American Concrete Institute Method of Mix Design11.3" Road Note No. 50-90 8000-12,000 180-360 4.6-15 Stiff plastic concrete (less than 80-mm slump) in general construction . b�y�[~ڰm�1*F��@;j��m�. CONCRETE MIX DESIGN. It is the process of determination or selection of the relative proportion of concrete ingredients that means cement, sand, coarse aggregate, and water to obtain concrete of desired quality.. From the strength point of view and economy, the main objective to select the fine and coarse aggregate in such a ratio to get a dense mix with minimum voids using the least amount of cement. Concrete Mix Design -Definition Concrete mix design is defined as the appropriate selection and proportioning of constituents to produce a concrete with pre-defined characteristics in the fresh and hardened states. <> 30-60 8500-12,500 130-250 2.3-8 Plastic concrete in thin walls, columns, beams, precast piles, thin slabs, and along construction joints. This project is currently underway as a joint effort between 11 0 obj See CHAPTER 3 Concrete Testing For e.g., a concrete mix of proportions 1:2:4 means that cement, fine and coarse aggregate are in the ratio 1:2:4 or the mix contains one part of … ��*�{*Ec�@�������-W/�Q��^M��ED^Y���z?�ɜ&o�5��a��q�cjd�LC)�� T�+���H�ʫ�6�����^~���7?���endstream So, concrete mix design can be stated as Concrete Mix = Cement:Sand:Aggregates. An example of proportioning a mix design through use of this form is detailed in Table 3.1. ���jO��:,LS�Y-����6Y/� |P�H��fy�z�>y��8������|Մ�~�(�d"؏ܿܭ9�ШF�9���x\��S�nw-'�ϋI }[���Fk�������u�z�x�\(� ���,���p�I1�e�%u�ftl��6�J�H��gN��4��)�6 <> stream endobj <> �HXz@;��"��"�4&�n�al(��k���i@`���H�1U! DOE a British mix design widely used in Ghana by most engineers, especially the C25 for structural beams and columns. Procedure. %���� Scope. endstream <> %�쏢 : the absolute volumes of cementitious materials, aggregate, water and air in one cubic yard of concrete. 0��}�G!��걸I1P�oo��M!�J2�b)��N��j�h�3�%^`���=�ՠOn���`8�C��2� 6�nf��vӮ����=�qP�pA�EH�{���م�2��D&$ �9�B��Nٺ]w� kwb����J�8���{e���^�����+yp�6]���v{N��@1/Q�"���=RrFF�k���ö�u|hOs�H��i$�h1�;�DF2�AZ������������0��w��)YSoX��7pk�X�p0�h�Z����Tp�Z_�~��E��ͱ��u���/���BC�8'{A�����+�D�C��l�%m��`�/o`%�Ž����G����� +>O�W#�ͼcZ�&��W^�|�_�I����p���Sn�Z@��F���Q�VG�O��]W��rJ!��ٗ�b�mi�z�r��s�,N��ɹ��w�=��DX�K -_�)��8��:IA+}� �� ��)iE�����2�a�F|W܉^}i�F���n��l�fshK�dJy���V�| �5ɕ�G�q4>��n�G��2`�˫����a��T The procedure is as follows: Step 1. This guide is to be used in conjunction with the CECALC.com Concrete Mix Design calculation for selecting proportions for initial concrete mix design. This is most rational approach to the selection of mix proportions with specific materials in mind possessing more or less unique characteristics. These test s require 30 days and are made on samples of representative materials. 12 0 obj endobj 8.5 Trial mixes of air-entrained concrete 28 8.6 Example of mix design 28 9 Design of Portland cement/pfa mixes 30 9.1 Introduction to pulverised-fuel ash (pfa) 30 9.2 Changes to the background information 30 9.3 Modiﬁcations to the mix design method 31 9.4 Example of mix design 32 9.5 Use of Portland pulverised-fuel ash cement 33 This method covers the procedure for designing concrete mixes and is based on the absolute volumes of the various components of the mix, i.e. _�Q6 Basic Concrete Mix Design Materials Pounds of material S.G. Abs Volume 667 3.15 X 62.4 Cement 667 3.15 3.39-Total Cementious 667 Miller Stone 1590 2.6 9.80 Evert Sand 1242 2.65 7.51 Water 300 1 481 1590 2.60 X 62.4 1242 2.65 X 62.4 4.81 Air 5.5% 1.485 Total 3799 27.00 w / cm 0.45 Unit Wt. A slump test can be used to measure the workability of concrete. 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