Qalaal Modern Constructions

Types of concrete cracking
Here are some types of cracks in reinforced concrete:
1. 𝐏𝐥𝐚𝐬𝐭𝐢𝐜 𝐬𝐡𝐫𝐢𝐧𝐤𝐚𝐠𝐞 𝐜𝐫𝐚𝐜𝐤𝐬: These cracks are often shallow, irregular. They occur when the concrete is still in its plastic state and is drying too quickly.
2. 𝐃𝐫𝐲𝐢𝐧𝐠 𝐬𝐡𝐫𝐢𝐧𝐤𝐚𝐠𝐞 𝐜𝐫𝐚𝐜𝐤𝐬: These are hairline cracks that run parallel to each other and can occur anywhere in the concrete as it dries and shrinks.
3. 𝐓𝐡𝐞𝐫𝐦𝐚𝐥 𝐜𝐫𝐚𝐜𝐤𝐬: This type of cracks is caused by temperature changes in the concrete. Extreme heat or cold can cause the concrete to expand or contract, resulting in cracks.
4. 𝐒𝐞𝐭𝐭𝐥𝐞𝐦𝐞𝐧𝐭 𝐜𝐫𝐚𝐜𝐤𝐢𝐧𝐠: These occur when the soil beneath the concrete settles or shifts, causing the concrete to crack and become uneven.
5. 𝐒𝐭𝐫𝐮𝐜𝐭𝐮𝐫𝐚𝐥 𝐜𝐫𝐚𝐜𝐤𝐬: These are cracks that occur due to overloading or inadequate design or poor materials or poor construction, in this case the applied loads exceed the capacity of the concrete to resist. Structural cracks typically exceed 0.3 mm, and may continue to widen over time. Structural cracks may include: Shear cracks, Flexural cracks, Shear/flexural cracks, Torsion cracks.
6. 𝐂𝐨𝐫𝐫𝐨𝐬𝐢𝐨𝐧 𝐜𝐫𝐚𝐜𝐤𝐬: These are cracks caused by expansion of the reinforcement steel inside the concrete due to corrosion.
7. 𝐂𝐫𝐚𝐜𝐤𝐬 𝐝𝐮𝐞 𝐭𝐨 𝐀𝐥𝐤𝐚𝐥𝐢-𝐚𝐠𝐠𝐫𝐞𝐠𝐚𝐭𝐞 𝐫𝐞𝐚𝐜𝐭𝐢𝐨𝐧 (𝐀𝐀𝐑): This is a chemical reaction that occurs between the alkaline cement paste and certain types of aggregates in the concrete, resulting in a gel-like substance that can cause expansion and cracking over time. AAR can include alkali-silica reaction (ASR) and alkali-carbonate reaction (ACR).

Photos from Qalaal Modern Constructions's post

29/01/2024

☑️ 𝐔𝐬𝐞𝐟𝐮𝐥 𝐈𝐧𝐟𝐨 𝐟𝐨𝐫 𝐂𝐢𝐯𝐢𝐥 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐈𝐈 ☑️☑️⁣
⁣
⁣
✅𝙁𝙊𝙇𝙇𝙊𝙒 𝙁𝙊𝙍 𝙐𝙎 𝙁𝙊𝙍 𝙈𝙊𝙍𝙀!! ✅✅⁣

⁣
⁣
⁣

26/01/2024

✔️𝐓𝐞𝐬𝐭 𝐨𝐧 𝐒𝐨𝐢𝐥𝐬 ✔️⁣⁣
✔️ 𝐒𝐭𝐚𝐧𝐝𝐚𝐫𝐝 𝐓𝐞𝐬𝐭 𝐨𝐧 𝐅𝐫𝐞𝐬𝐡 𝐂𝐨𝐧𝐜𝐫𝐞𝐭𝐞 ✔️⁣⁣
⁣⁣
D̲o̲n̲'̲t̲ ̲F̲o̲r̲g̲e̲t̲ ̲t̲o̲ ̲F̲o̲l̲l̲o̲w̲ ̲U̲s̲ ̲f̲o̲r̲ ̲M̲O̲R̲E̲!̲!̲!̲!̲✅̲✅̲⁣⁣

̲

23/01/2024

𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐜𝐞 𝐁𝐞𝐭𝐰𝐞𝐞𝐧 𝐎𝐧𝐞-𝐰𝐚𝐲 𝐬𝐥𝐚𝐛 𝐚𝐧𝐝 𝐚 𝐓𝐰𝐨-𝐰𝐚𝐲 𝐒𝐥𝐚𝐛 ⁣
⁣

19/01/2024

𝗨𝘀𝗲𝗳𝘂𝗹 𝗜𝗻𝗳𝗼 𝗳𝗼𝗿 𝗖𝗶𝘃𝗶𝗹 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 ☑️☑️

12/01/2024

𝐁𝐚𝐬𝐢𝐜 𝐋𝐚𝐰'𝐬 ☑️☑️⁣⁣
⁣⁣
𝐅o𝐥l𝐨w U𝐬 𝐟o𝐫 𝐌o𝐫e ✔️✔️

09/01/2024

𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭𝐢𝐚𝐥 𝐥𝐞𝐯𝐞𝐥𝐢𝐧𝐠 ✔️✔️⁣⁣
⁣⁣
D𝐨n't F𝐨r𝐠e𝐭 𝐭o F𝐨l𝐥o𝐰 𝐔S ✅✅

31/12/2023

𝓗𝓐𝓟𝓟𝓨 𝓝𝓔𝓦 𝓨𝓔𝓐𝓡!!

29/12/2023

𝐏𝐋𝐀𝐒𝐓𝐄𝐑𝐈𝐍𝐆 ✔️✔️

26/12/2023

𝐂𝐚𝐥𝐜𝐮𝐥𝐚𝐭𝐢𝐨𝐧 𝐍𝐨𝐭𝐞𝐛𝐨𝐨𝐤 𝐟𝐨𝐫 𝐂𝐚𝐧𝐭𝐢𝐥𝐞𝐯𝐞𝐫 𝐑𝐨𝐨𝐟 𝐚𝐧𝐝 𝐂𝐚𝐧𝐨𝐩𝐲 ✔️✔️⁣
⁣
𝘿𝙤𝙣'𝙩 𝙁𝙤𝙧𝙜𝙚𝙩 𝙩𝙤 𝙁𝙤𝙡𝙡𝙤𝙬 𝙐𝙎!!✅✅

22/12/2023

𝐄𝐟𝐟𝐞𝐜𝐭𝐢𝐯𝐞 𝐋𝐞𝐧𝐠𝐭𝐡 𝐨𝐟 𝐒𝐢𝐦𝐩𝐥𝐲 𝐒𝐮𝐩𝐩𝐨𝐫𝐭𝐞𝐝 𝐁𝐞𝐚𝐦 ☑️☑️

18/12/2023

Bar Bending Schedule:⁣⁣
📌𝐂𝐮𝐭𝐭𝐢𝐧𝐠 𝐋𝐞𝐧𝐠𝐭𝐡 𝐨𝐟 𝐃𝐢𝐚𝐦𝐨𝐧𝐝 𝐒𝐭𝐢𝐫𝐫𝐮𝐩𝐬⁣⁣
⁣⁣
➡️ Calculation of "a"⁣⁣
a = 500 - (2 x 40) - (4) - (4)⁣⁣
= 412 mm⁣⁣
➡️ Calculation of "b"⁣⁣
b = 400 - (2 x 40) - (4) - (4)⁣⁣
= 312 mm⁣⁣
Calculation of "C"⁣⁣
C = 258.4 mm⁣⁣
➡️ DEDUCTION:⁣⁣
📌90 Deg. : 2d⁣⁣
📌135 Deg. : 3d⁣⁣
➡️ADDITION:⁣⁣
📌HOOK Length = 10d⁣⁣
✔️ C.L. = (4 x c) + 2(10d) - 3(2d) - 2(3d)⁣⁣
✔️C.L. = (4 x 258.4) + 2(10*8) -3(2*8)- 2(3*8) =1097.6 mm⁣⁣
📌AS PER IS-2502⁣⁣
✔️ C.L. = 4c + 24 d⁣⁣
✔️C.L. = 4 x 258.4 + 24*8⁣⁣
= 1225.6 mm

14/12/2023

𝐂𝐫𝐚𝐜𝐤 𝐓𝐫𝐞𝐚𝐭𝐦𝐞𝐧𝐭𝐬: 𝐒𝐭𝐢𝐭𝐜𝐡𝐢𝐧𝐠 ✔️✔️

07/12/2023

Marshall mix design is a widely implemented method to determine the optimum asphalt content (OAC) prior to the road construction.
Test specimens with different asphalt binder content are prepared. The specimens should then be weighed to ease the calculation for important parameters such as bulk density, voids in total mix (VTM), voids in mineral aggregate (VMA) and voids filled with asphalt (VFA).
The specimens are first compacted using Marshall hammer before they are being tested for Marshall stability and flow.
The test results and calculated parameters are then plotted against asphalt binder content.
From the plots of bulk density, Marshall stability and VTM, we determine individual OAC values based on individual criterion. The value of OAC for the asphalt mix would be the average of these three values.
It is important to note that, all parameters should be checked against the limits and criteria set out by relevant authorities for various purposes.

Claim ownership or report listing

Want your business to be the top-listed Contractor in Kampala?
Click here to claim your Sponsored Listing.