_�Q6 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 : the absolute volumes of cementitious materials, aggregate, water and air in one cubic yard of concrete. :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�&� �. 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. StonemontQC is fully integrated with the aggregate portion allowing for mix component properties to be easily kept current with data from aggregate plants. 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? x��YKoG����0X���Ӏ�Cl'���r0r���4���%�>_5���P5l�f/���z|U#��({����|�^|���e>�B�RJ��"h)��b��g?}#6�w�H镴��7��?�3���! 5/2017 Page 3 of 17 Slum ps given in Table(1) may be increased when chemical admixtures are used, An example of proportioning a mix design through use of this form is detailed in Table 3.1. This project is currently underway as a joint effort between 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. 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 �HXz@;��"��"�4&�n�al(��k���i@`���H�1U! It is also helpful to have handy copies of the standards referenced in the project specifications and in ACI 318. 11 0 obj In 1954 the method was revised to include, among other modifications, the use of entrained air. 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. endobj For making trial -2, Weight of material required will be calculated for 4 no’s cube assuming 25% wastage. Grading of the aggregate is presented in Figure 4. <> 50-90 8000-12,000 180-360 4.6-15 Stiff plastic concrete (less than 80-mm slump) in general construction . %���� The below mentioned method can be applied to any grade of concrete by changing the values. endobj Weight of Fine aggregate =790.3 kg/m 3. %PDF-1.4 CONCRETE MIXES The ACI Standard 211.1 is a “Recommended Practice for Selecting Proportions for Concrete”. Concrete mix design is the process of finding the proportions of concrete mix in terms of ratios of cement, sand and coarse aggregates. 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. Also used for lab test specimens. 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! Concrete mix design. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 17 0 R/StructParents 2>> 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.. ���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 This is most rational approach to the selection of mix proportions with specific materials in mind possessing more or less unique characteristics. )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 2. stream 5.3 MIX DESIGN METHODS 5.3.1 CONCRETE MIX DESIGN 1. 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. 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. specifically developed for concrete pavements, the DOE method is applicable to concrete for most purposes, including roads. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 720 540] /Contents 8 0 R/StructParents 1>> endobj '���Mh� _s��r�ID8s� iO�j� <> 6 0 obj �u�E�^��E���������Q� �wC��-�b��ل�G�8�� �Z�\p��sQN i�Z}�ub=>�7~,#p� ���2�ft�Ǯ�z'�a��������v�ѻ�#$��1J�h��@3��3N��~��Ȗ�)����������:?�y{�Gع3�� 520 endobj endobj [ 11 0 R] Procedure. <> endobj 10 0 obj This method covers the procedure for designing concrete mixes and is based on the absolute volumes of the various components of the mix, i.e. x��ZK�G���c+X����j��!v����c�=9�R�L'z�J����KVk٢����x�"��,U��Q�y��û����۷����U���t����X�c����ա����]���L�����hW�7��s>�~���@����L�Q�?2��_�~���PYe}�s��j]� T�й�|�;�c3�������-�y�"�~�E�WQ��V��f����l��ݔ���������^�+ �m$���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� Modifications, the use of entrained air a preliminary mix design through use of entrained air point... 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