5/2017 Page 3 of 17 Slum ps given in Table(1) may be increased when chemical admixtures are used, Grading of the aggregate is presented in Figure 4. 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. 8 0 obj This guide is to be used in conjunction with the CECALC.com Concrete Mix Design calculation for selecting proportions for initial concrete mix design. <> concrete in thin members. ���~����?��mAÜL��I�[]�S_}Ů� �;��y��K2g��|�-��y14>����r��cI����� �fH�t�!����z`� ���䐖��Űt^��[eF�xZ~ 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. �u�E�^��E���������Q� �wC��-�b��ل�G�8�� �Z�\p��sQN i�Z}�ub=>�7~,#p� ���2�ft�Ǯ�z'�a��������v�ѻ�#$��1J�h��@3��3N��~��Ȗ�)����������:?�y{�Gع3�� 0��}�G!��걸I1P�oo��M!�J2�b)��N��j�h�3�%^`���=�ՠOn���`8�C��2� 6�nf��vӮ����=�qP�pA�EH�{���م�2��D&$ �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 Weight of Coarse aggregate = 1073.33 kg/m 3. 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. 3137 prior to completion of a mix design. The contractor establishes the initial parameters for a mix design and serves as the starting point for subsequent proportioning calculations. 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 15 0 obj :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�&� �. stream Procedure. A slump test can be used to measure the workability of concrete. c) Various requirements have been modified in line with the requirements of IS 456 : 2000 'Plain and reinforced concrete - Code ofpractice (fourth revision)'. <>/OutputIntents[<>] /Metadata 792 0 R>> <> <> The mix design procedure is given in IS-10262- 1982. The Concrete Hub app, however, solves these challenges associated with creating a unique concrete mix. The concrete mix design involves various steps, calculations and laboratory testing to find right mix proportions. 17 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. [ 11 0 R] endobj <> b) The applicability ofthe standard has been specified for ordinary and standard concrete grades only. StonemontQC includes a powerful concrete mix design and quality control software program for concrete producers. This project is currently underway as a joint effort between 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. The Concrete Hub app now provides an easy, fast, and free way to perform a preliminary mix design. ���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 American Concrete Institute Method of Mix Design (ACI–211.1) This method of proportioning was first published in 1944 by ACI committee 613. Adapted from ACI 309 endobj 10 0 obj endobj endobj 14 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� endobj 4 0 obj �@A�x��^[ <> 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. %PDF-1.4 Weight of Water = 197.4 kg/m 3. 3. CONCRETE MIX DESIGN. endobj endobj endobj %���� endobj Scope. 1 0 obj 2 0 obj Choice of maximum size of aggregate Step 3. 7 0 obj 13 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 In 1970, the method of mix design became the responsibility of ACI committee 211. Concrete mix design. stream An example of proportioning a mix design through use of this form is detailed in Table 3.1. 50-90 8000-12,000 180-360 4.6-15 Stiff plastic concrete (less than 80-mm slump) in general construction . 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. Calculation of cement content Step 6. However the concrete mix design is done on every new project in the begging for accuracy. CONCRETE MIXES The ACI Standard 211.1 is a “Recommended Practice for Selecting Proportions for Concrete”. 9 0 obj Concrete Mix Design and Quality Control Software Management System. 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. 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. 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? DOE with required cement type, water cement ratio, etc for a ( 1:2:4) reinforced concrete mix. <> )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 28. concrete mix designs. concrete mixes. 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. 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*�� A minimum of two 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. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 17 0 R/StructParents 2>> endobj <> endobj endstream 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. endobj These test s require 30 days and are made on samples of representative materials. <> This is most rational approach to the selection of mix proportions with specific materials in mind possessing more or less unique characteristics. Concrete Mix Proportions for Trial Mix 2. 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. 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 … 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. endobj DOE a British mix design widely used in Ghana by most engineers, especially the C25 for structural beams and columns. endobj If there is an appreciable difference, the constituent contents will differ from those intended in the initial design. �HXz@;��"��"�4&�n�al(��k���i@`���H�1U! Selection of water/cement ratio Step 5. 15 0 obj 6 0 obj Estimation of mixing water and air content Step 4. {B��C�Q�?�㰝��Mu�*-h�S���6�N��%��b������@A���ع��e�q�� 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! x��YKoG����0X���Ӏ�Cl'���r0r���4���%�>_5���P5l�f/���z|U#��({����|�^|���e>�B�RJ��"h)��b��g?}#6�w�H镴��7��?�3���! For making trial -2, Weight of material required will be calculated for 4 no’s cube assuming 25% wastage. 2.1. In general, concrete mixes are designed in order to achieve a defined workability, strength and durability . specifically developed for concrete pavements, the DOE method is applicable to concrete for most purposes, including roads. The initial step in proportioning the mix design is to calculate the water content per cubic yard of concrete. 16 0 obj Concrete Mix Design a nd Trail Mixes Execution TR No. Slump and Kelly Ball testing would be performed to investigate workability of mixture. endobj All concrete mixes possess unique properties, the design process can be time-consuming and challenging. <> 4 Method" DOE Method of Concrete Mix Design11.4 %PDF-1.2 Concrete”, specifically Chapter 6, “Procedure” and Appendix 1, “Metric (SI) System Adaptation. Weight of Cement = 384.8 kg/m 3. ;��x҇�}�y���T��h�>-X�zg�/� endobj _�Q6 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. <> It really is as simple as it sounds. 520 All aggregates are dry, absorbing 0.8 %, not crushed Step 1. endobj Concrete Hub’s Concrete Mix Design Tool. '���Mh� _s��r�ID8s� iO�j� 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. So, concrete mix design can be stated as Concrete Mix = Cement:Sand:Aggregates. 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. 5.3 MIX DESIGN METHODS 5.3.1 CONCRETE MIX DESIGN 1. Also used for lab test specimens. 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. It is also helpful to have handy copies of the standards referenced in the project specifications and in ACI 318. 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. Calculation of cement content-- Once the water <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 8 0 R/StructParents 1>> 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 slump Step 2. stream 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 0 obj 2. <> 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. %�쏢 ��*�{*Ec�@�������-W/�Q��^M��ED^Y���z?�ɜ&o�5��a��q�cjd�LC)�� T�+���H�ʫ�6�����^~���7?���endstream See CHAPTER 3 Concrete Testing 6 0 obj endstream <> In 1954 the method was revised to include, among other modifications, the use of entrained air. The procedure is as follows: Step 1. 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 11 0 obj 12 0 obj Concrete mix design is the process of finding the proportions of concrete mix in terms of ratios of cement, sand and coarse aggregates. earlier title 'Recommendedguidelines for concrete mix design'. Weight of Fine aggregate =790.3 kg/m 3. stream 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.. 3 0 obj 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. 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. The below mentioned method can be applied to any grade of concrete by changing the values. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 4 0 R/StructParents 0>> stream b�y�[~ڰm�1*F��@;j��m�. 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