Final Last Mod POSTER MSR
1
EVALUATING THE EFFICACY OF MORTAR PREPARED USING INDUSTRIAL SOLID WASTE AS FINE AGGREGATE 1 Rathod Mehulkumar R. (Enrollment No: 130280715017) 2 Prof. Poonam I. Modi 1 P.G. Student, 2 Assistant Professor, Applied Mechanics Department, L.D.C.E, Ahmedabad ABSTRACT The purpose of this study is to evaluate the strength of the mortar that is prepared by replacing the fine aggregate i.e. sand with 0%, 25% and 50% of Quarry dust and Foundry sand respectively. These industrial by-products are generally dumped in landfills in huge quantities which disturbs the Ecology. In this study, an attempt is made to evaluate the efficacy of the waste products when used in mortar for brick masonry. Two proportions of the mortar were selected for the study i.e. 1:4 and 1:6. 7 th days and 28 th days compressive strength of Mortar cubes and the mechanical properties of the final end product i.e. Brick masonry were determined at 28 th days. The tests included the Compressive strength of the brick prisms, Bond strength of the mortar in brick prism under flexure and in shear. 1. INTRODUCTION Mortar is a workable paste used to bind building blocks such as stones, bricks, and concrete masonry units together, fill and seal the irregular gaps between them. Application of Mortar (i). Brickwork and finishing the surfaces. (ii) Plastering works. (iii).Water proofing to prevent the leakage. 2. OBECTIVE OF THE STUDY To examine the suitability of using industrial solid wastes like Foundry sand and Quarry dust as fine aggregate in mortar. To develop the comparative analysis of the following parameters: (i) Compressive strength of mortar, (ii) Brick – mortar prism compressive strength (iii) Flexural bond strength, (iv) Shear bond strength. 3. TEST AND RESULTS (A) Physical Properties of Fine Aggregates : (B) Compressive Strength of Mortar Cubes : As per IS: 2250– 1981 [3] Mix Proportions, 1:4 and 1:6 were selected for the compressive strength of mortar cubes at 7 and 28 days and the following mortar mix were prepared: : River Sand (control mix) : 25% Quarry Stone Dust + 75% River Sand : 25% Foundry Sand + 75% River Sand : 50% Quarry Stone Dust + 50% River Sand : 50% Foundry Sand + 50% River Sand . Sr . No Properties Natur al sand Quarr y dust Foundr y sand Reference to Method of Test 1 Fineness Modulus 2.36 2.66 2.16 IS 2116 1980 [1] 2. Specific gravity 2.64 2.67 2.58 IS 2386 (Part III) 1963 [2] 3. Bulk density(kN/m 3) 14.71 15.53 14.35 IS 2386 (Part III) 1963 [2] 4. Water absorption (%) 2 5.8 2.4 IS 2386 (Part III) 1963 [2] 5. Moisture content (%) 1.4 Nil Nil IS 2386 (Part III) 1963 [2] Mortar Mix M1 M2 M3 M4 M5 W/C ratio 1:4 0.6 3 0.7 7 0.6 6 0.9 2 0.9 6 1:6 0.7 6 0.8 5 0.8 0 1.0 5 1.2 5 Flow Value (%) 1:4 111 114 110 113 111 1:6 112 113 110 112 112 Water Retentivity (%) 1:4 72. 3 80. 7 72. 8 76. 3 71. 4 1:6 71. 5 74. 9 70. 3 73. 2 69. 1 Quarry Dust Foundry Sand 0 2 4 6 8 10 12 14 16 13.26 13.26 14.45 13.89 12.73 11.27 0% 25% Fine Aggregates Compressive Strength of Cubes (N/mm2) Quarry Dust Foundry Sand 0 1 2 3 4 5 6 7 8 6.24 6.24 7.87 6.64 6.07 5.2 0% 25% 50% Fine Aggregates Compressive Strength of Cubes (N/mm2) Figure: 28 th Days Comp. strength of cubes VS Fine aggregates for Mortar Mix 1:4 Figure: 28 th Days Comp. strength of cubes VS Fine aggregates for Mortar Mix 1:6 Figure : Failure pattern of Brick prisms (D) Shear Bond Strength Test on Brick Triplets [5] : The shear characteristics of brick-mortar joint were determined on brick triplet size 240 x 215 x 100 mm were casted using test mortar. Shear stresses develop in between the mortar and the masonry unit contact planes as shown in figure. Shear bond strength (N/mm 2 ) = P/2A, Where, P = Vertical compressive load (N), A= c/s area of middle brick. Figure: Shear bond strength on Brick triplet (Before and After Test) Avg. Shear Bond Strength of Brick Triplets (N/mm 2) at 28 th Days Mortar Mix M1 M2 M3 M4 M5 1:4 0.62 0.83 0.7 0.45 0.49 1:6 0.31 0.46 0.39 0.18 0.26 (E) Flexural Bond Strength: Modified Bond Wrench Test [6] : The modified bond wrench test set-up as shown below figure was used to determine the Bond strength of the masonry unit in flexure . Brick prism size 215 x 490 x 100 mm were casted using test mortar. This load causes a moment in the prism, which will further cause a flexure failure between the masonry unit and the mortar Flexural bond strength, (N/mm 2 ) f = P.L + P1.L1 Where, P = Max. load (N), L= 780mm Z L1= 280 mm, Z= Section modulus(mm Avg. Flexural Bond Strength of Brick Prisms (N/mm 2) at 28 th Days Mortar Mix M1 M2 M3 M4 M5 1:4 0.23 0.28 0.24 0.21 0.26 1:6 0.20 0.23 0.21 0.18 0.17 Table : Fresh Properties of Mortar (a) (b ) (c) Figure: Flow of (a) Natural sand (b) Quarry dust (c) Foundry sand Mortar The water is added to mixing bowl until the mortar make workable to give a flow 110 to 115 by flow table test. And also water retentivity of mortar should not be less than 70%. (C) Compressive Strength of Brick Masonry Prism [4] : The brick prisms of size 215 x 215 x 400 mm for 1:4 and 1:6 mortar proportion prepared by the test mortar. Brick prisms were prepared using bricks with compressive value of 5.88 MPa and having height to width ratio of 1.86. Avg. Compressive Strength of Brick Prisms(N/mm 2) at 28 th Days Morta r Mix M1 M2 M3 M4 M5 1:4 1.0 8 1.2 1.1 1 0.91 0.76 1:6 0.6 0.6 5 0.6 4 0.63 0.55 Figure: Modified Bond Wrench Test Setup 4. CONCLUSIONS Mortar mixture thus prepared by replacing 25% and 50% of Natural river sand with Quarry dust & Foundry sand, is found to be workable.The values of water retentivity for the mixes are also acceptable and are above 70 %. For 1:4 and 1:6 mortar mix; At 28 th days, Compressive strength of Mortar cubes, Compressive strength of Brick prisms, Bond strength of prisms in Shear and Flexure for the mortar mixture prepared using Quarry dust (25%) and Foundry sand (25%) respectively with Natural Sand and Cement were found to be higher in comparison to the mortar prepared using Natural river sand and Cement. The failure pattern in Compressive strength of brick prism indicates that the crack appears in the brick and not in the mortar joint which proves the efficacy of the mortar. 5. REFERENCES [1] IS: 2386-1963, (Part I and Part III) Indian Standards methods of test for aggregate for concrete, Bureau of Indian Standards, New Delhi, India. [2] IS: 2386-1963, (Part I and Part III) Indian Standards methods of test for aggregate for concrete, Bureau of Indian Standards, New Delhi, India. [3] IS: 2250–1981 (Reaffirmed 2000) Indian Standard code of practice for Preparation and use of masonry mortars (First revision), Bureau of Indian Standards. [4] IS: 1905-1987 (Reaffirmed 2002) Indian Standard code of practice for structural use of unreinforced masonry (Third revision), Bureau of Indian Standards, New Delhi. [5] C. Freeda Christy, “Bond Strength of The Brick Masonry”, Tamilnadu, India.
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EVALUATING THE EFFICACY OFMORTAR PREPARED USING INDUSTRIAL SOLID WASTE AS FINE AGGREGATE1Rathod Mehulkumar R. (Enrollment No: 130280715017) 2Prof. Poonam I. Modi 1P.G. Student, 2Assistant Professor, Applied Mechanics Department, L.D.C.E, AhmedabadABSTRACTThe purpose of this study is to evaluate the strength of the mortar that is prepared by replacing the fine aggregate i.e. sand with 0%, 25% and 50% of Quarry dust and Foundry sand respectively. These industrial by-products are generally dumped in landfills in huge quantities which disturbs the Ecology. In this study, an attempt is made to evaluate the efficacy of the waste products when used in mortar for brick masonry. Two proportions of the mortar were selected for the study i.e. 1:4 and 1:6. 7th days and 28th days compressive strength of Mortar cubes and the mechanical properties of the final end product i.e. Brick masonry were determined at 28th days. The tests included the Compressive strength of the brick prisms, Bond strength of the mortar in brick prism under flexure and in shear.
INTRODUCTIONMortar is a workable paste used to bind building blocks such as stones, bricks, and concrete masonry units together, fill and seal the irregular gaps between them.Application of Mortar (i). Brickwork and finishing the surfaces. (ii) Plastering works. (iii).Water proofing to prevent the leakage. 2. OBECTIVE OF THE STUDYTo examine the suitability of using industrial solid wastes like Foundry sand and Quarry dust as fine aggregate in mortar.To develop the comparative analysis of the following parameters:(i) Compressive strength of mortar, (ii) Brick mortar prism compressive strength(iii) Flexural bond strength, (iv) Shear bond strength.
3. TEST AND RESULTS (A) Physical Properties of Fine Aggregates :
(B) Compressive Strength of Mortar Cubes : As per IS: 22501981[3]Mix Proportions, 1:4 and 1:6 were selected for the compressive strength of mortar cubes at 7th and 28th days and the following mortar mix were prepared: M1- Cement : River Sand (control mix) M2- Cement : 25% Quarry Stone Dust + 75% River Sand M3- Cement : 25% Foundry Sand + 75% River Sand M4- Cement : 50% Quarry Stone Dust + 50% River Sand M5- Cement : 50% Foundry Sand + 50% River Sand
. Sr.NoPropertiesNatural sandQuarry dustFoundry sandReference to Method of Test 1Fineness Modulus2.362.662.16IS 2116 1980[1] 2. Specific gravity2.642.672.58IS 2386 (Part III) 1963[2] 3.Bulk density(kN/m3)14.7115.5314.35IS 2386 (Part III) 1963[2] 4.Water absorption (%)25.82.4IS 2386 (Part III) 1963[2] 5.Moisture content (%)1.4 NilNilIS 2386 (Part III) 1963[2]
Mortar MixM1M2M3M4M5W/C ratio1:40.630.770.660.920.961:60.760.850.801.051.25Flow Value (%)1:41111141101131111:6112113110112112Water Retentivity (%)1:472.380.772.876.371.41:671.574.970.373.269.1Figure: 28th Days Comp. strength of cubes VS Fine aggregates for Mortar Mix 1:4Figure: 28th Days Comp. strength of cubes VS Fine aggregates for Mortar Mix 1:6
Figure : Failure pattern of Brick prisms (D) Shear Bond Strength Test on Brick Triplets [5] :The shear characteristics of brick-mortar joint were determined on brick triplet size 240 x 215 x 100 mm were casted using test mortar. Shear stresses develop in between the mortar and the masonry unit contact planes as shown in figure. Shear bond strength (N/mm2) = P/2A, Where, P = Vertical compressive load (N), A= c/s area of middle brick.
Figure: Shear bond strength on Brick triplet (Before and After Test) Avg. Shear Bond Strength of Brick Triplets (N/mm2) at 28th DaysMortar MixM1M2M3M4M51:40.620.830.70.450.491:60.310.460.390.180.26 (E) Flexural Bond Strength: Modified Bond Wrench Test [6] :The modified bond wrench test set-up as shown below figure was used to determine the Bond strength of the masonry unit in flexure . Brick prism size 215 x 490 x 100 mm were casted using test mortar. This load causes a moment in the prism, which will further cause a flexure failure between the masonry unit and the mortar
Flexural bond strength, (N/mm2)f = P.L + P1.L1 Where, P = Max. load (N), L= 780mm Z L1= 280 mm, Z= Section modulus(mm3)
Avg. Flexural Bond Strength of Brick Prisms (N/mm2) at 28th DaysMortar MixM1M2M3M4M51:40.230.280.240.210.261:60.200.230.210.180.17Table : Fresh Properties of Mortar (a)(b)(c)Figure: Flow of (a) Natural sand (b) Quarry dust (c) Foundry sand MortarThe water is added to mixing bowl until the mortar make workable to give a flow 110 to 115 by flow table test. And also water retentivity of mortar should not be less than 70%. (C) Compressive Strength of Brick Masonry Prism[4] :The brick prisms of size 215 x 215 x 400 mm for 1:4 and 1:6 mortar proportion prepared by the test mortar. Brick prisms were prepared using bricks with compressive value of 5.88 MPa and having height to width ratio of 1.86. Avg. Compressive Strength of Brick Prisms(N/mm2) at 28th DaysMortar MixM1M2M3M4M51:41.081.21.110.910.761:60.60.650.640.630.55Figure: Modified Bond Wrench Test Setup
4. CONCLUSIONSMortar mixture thus prepared by replacing 25% and 50% of Natural river sand with Quarry dust & Foundry sand, is found to be workable.The values of water retentivity for the mixes are also acceptable and are above 70 %.For 1:4 and 1:6 mortar mix; At 28th days, Compressive strength of Mortar cubes, Compressive strength of Brick prisms, Bond strength of prisms in Shear and Flexure for the mortar mixture prepared using Quarry dust (25%) and Foundry sand (25%) respectively with Natural Sand and Cement were found to be higher in comparison to the mortar prepared using Natural river sand and Cement.The failure pattern in Compressive strength of brick prism indicates that the crack appears in the brick and not in the mortar joint which proves the efficacy of the mortar.5. REFERENCES [1] IS: 2386-1963, (Part I and Part III) Indian Standards methods of test for aggregate for concrete, Bureau of Indian Standards, New Delhi, India. [2] IS: 2386-1963, (Part I and Part III) Indian Standards methods of test for aggregate for concrete, Bureau of Indian Standards, New Delhi, India. [3] IS: 22501981 (Reaffirmed 2000) Indian Standard code of practice for Preparation and use of masonry mortars (First revision), Bureau of Indian Standards. [4] IS: 1905-1987 (Reaffirmed 2002) Indian Standard code of practice for structural use of unreinforced masonry (Third revision), Bureau of Indian Standards, New Delhi. [5] C. Freeda Christy, Bond Strength of The Brick Masonry, Tamilnadu, India. [6] S. Pava, Flexural bond strength of natural hydraulic lime mortar and brick, Ireland.
