จำนวน Repository ( 4 )

การพัฒนาผลิตภัณฑ์แผ่นผนังคอนกรีตน้ำหนักเบาผสมทางมะพร้าวเหลือทิ้งสำหรับวิสาหกิจชุมชนขนาดเล็ก
การพัฒนาผลิตภัณฑ์แผ่นผนังคอนกรีตน้ำหนักเบาผสมทางมะพร้าวเหลือทิ้งสำหรับวิสาหกิจชุมชนขนาดเล็ก

The objectives of this research are to study the product development of light weight concrete wall board mixed with coconut leaf waste for small community enterprise to find the suitable coconut leaf waste mixed ratio with cement river sand coconut leaf waste water and catalyst accelerator at 1:0.4:0.13:0.33:0.03 ratio. CC13 (1:0.13) at 28 days has density 2266 kg/m3 bending resistance 3.05 MPa heat conduction efficiency 0.236 W/m-K. The coconut leaf waste can absorb water inside and the cement board can attach to the concrete wall easily. Suitability to make the big concrete wall.

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สมบัติทางวิศวกรรมของบล็อคปูพื้นคอนกรีตพรุนจากผิวทางแอสฟัลต์เก่านำมาใช้ใหม่โดยการแทนที่มวลรวมหยาบ
สมบัติทางวิศวกรรมของบล็อคปูพื้นคอนกรีตพรุนจากผิวทางแอสฟัลต์เก่านำมาใช้ใหม่โดยการแทนที่มวลรวมหยาบ

This research aimed to study the use of coarse aggregate obtained from removing old recycled asphalt pavement (RAP) in the production of the porous concrete paving block. Crushing and size separation of the coarse aggregate by using standard sieve size by selected the gradation size of the coarse aggregate that passed to sieve size 1/2” and retained on sieve size 3/8” and other that passed to sieve size 3/8” and retained on sieve size No.4 by mixing ratio 50 : 50 of the mass as replaced natural coarse aggregate. Portland cement quantity about 18% and 20% by weight of the aggregate. The water to cement ratio was 0.30 and 0.35 respectively. Compressive strength flexural strength and water permeability were investigated. The results showed that the cement content and water to cement ratio was influenced the strength properties and water permeability rate of the porous concrete paving block. The porous concrete paving block mixed with higher cement content (20%) had the compressive strength at the age of 28 days increased by 16-24% when compared with lower cement content (18%). On the other hand the water permeability rate decreased by 5.1-8.1%.

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การพัฒนาผลิตภัณฑ์ผนังคอนกรีตมวลเบาด้วยการเสริมแผ่นโฟมอัดแน่นเพื่อเป็นฉนวนความร้อน
การพัฒนาผลิตภัณฑ์ผนังคอนกรีตมวลเบาด้วยการเสริมแผ่นโฟมอัดแน่นเพื่อเป็นฉนวนความร้อน

This research has objectives to study the production to find the proper size of steel wire mesh to test the properties and to study the implementation of high strength and thermal insulation cement-bonded fiberboard from coconut meal corncob fibers and steel wire mesh. The mixture ratio of cement-bonded fiberboard included Portland cement type1: sand: coconut meal fiber: corncob fiber: water: calcium chloride equal to 1: 0.2: 0.0125: 0.0375: 0.3: 0.03 by weight and 5 different sizes of steel wire mesh were reinforced. Casted by compression and sharking machine. Tested the properties follow the TIS.878-2537. From the results 1 mm of diameter and 1” of gab of steel wire mesh (? 1 mm # 1”) was the proper size to reinforce the cement-bonded fiberboard to get highest bending strength. Moreover this cement-bonded fiberboard can pass the required standard. The high strength and thermal insulation cement-bonded fiberboard from coconut meal corncob fibers and steel wire mesh has the possibility to construction as exterior building wall.

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นวัตกรรมคอนกรีตมวลเบาแบบเซลลูล่าด้วยการใช้วัสดุเหลือทิ้ง
นวัตกรรมคอนกรีตมวลเบาแบบเซลลูล่าด้วยการใช้วัสดุเหลือทิ้ง

This research presents a study of the compressive strength tensile strength flexural strength and water absorption of Cellular Lightweight Concrete containing fine fly ash and ground bagasse ash. Portland cement (CT) is partially replaced with pozzolans 20 30 and 40% by weight of the cementitious materials. The results show that the compressive strength tensile strength flexural strength and low water absorption of Cellular Lightweight Concrete improves substantially with partial replacement of Portland cement with fly ash and bagasse ash. Cellular Lightweight Concrete mix cement containing 20 and 30% of pozzolans can be used to make cementitious materials. In addition the use of fly ash and ground bagasse ash produces Cellular Lightweight Concrete mix with good compressive strength tensile strength flexural strength and water absorption.

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