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Joints of/in DBM/BC(joints making details of DBM and BC), longitudinal joints (अनुदैर्ध्य जोड़ों), Transverse joints (अनुप्रस्थ जोड़ो) as per MORTH and Indian standard

JOINTS making details of  DBM and BC

       Joints play a most important roll in laying of DBM /BC. if no proper joints are provided it (joint) may open and allow to flow of water to the base course(WMM Layer) and cause damage the pavement.

So today we shall learn about offsets and thickness of joints( in loose state).

To know more information about Dense Bituminous Macadam (DBM) , please click on below link 🔗

डीबीएम / बीसी के बिछाने में जोड़ों का सबसे महत्वपूर्ण रोल होता है।  यदि  उचित जोड़ों(joints) को प्रदान नहीं किया जाता है, तो यह (संयुक्त-joint) खुल सकता है और बेस कोर्स (WMM लेयर) में पानी के प्रवाह की अनुमति देता है और pavement को नुकसान पहुंचाता है।

 इसलिए आज हम ऑफसेट और जोड़ों की मोटाई (ढीली अवस्था में) के बारे में जानेंगे।

  Where joints made, the material shall be fully compacted and the joint made flush in one the following ways:,

To know more information about Bituminous concrete  (BC) , please click on below link 🔗

जहां जोड़ों को बनाया गया है, सामग्री पूरी तरह से संकुचित (compacted)हो जाएगी और संयुक्त(joint) निम्न प्रकार से फ्लश करेगा:

A - Offset of bituminous joints 

All joints shall be cut vertical to the full thickness of the previously laid mix. All loosened material shall be discarded and the vertical face coated with suitable viscosity grade hot bitumen, or cold applied emulsified bitumen. While spreading the material  along the joint, the material spread shall overlap 25 mm to 50 mm on the previously laid Mix beyond the vertical face of the joints.

सभी जोड़ों को पहले रखी गई मिश्रण (previously laid mix) की पूरी मोटाई के लिए लंबवत (vertical)काट दिया जता है।  सभी ढीला सामग्री को हटा दिया  जाता है और ऊर्ध्वाधर चेहरा (vertical face)  को चिपचिपाहट ग्रेड गर्म कोलतार, या ठंडे लागू पायसीकृत बिटुमेन (cold applied emulsified bitumen )के साथ लेपित कर दिया जाता है ।  संयुक्त के साथ सामग्री को फैलाने के दौरान, सामग्री( material) को पहले जोड़ों के ऊर्ध्वाधर चेहरे से पीछे 25 मिमी से 50 मिमी तक ओवरलैप करते हैं।

B -  Thickness of bituminous layer at joint 

 The thickness of the loose overlap material should be approximately a quarter more than the final compacted thickness. The overlap mix shall be dragged back to the hot lane so that the roller can press the small excess onto the hot side of the joint to obtain a high joint density.

ढीले ओवरलैप सामग्री की मोटाई अंतिम कॉम्पैक्ट मोटाई से लगभग एक चौथाई अधिक होनी चाहिए।  ओवरलैप मिक्स को वापस गर्म लेन पर खींचा जाएगा ताकि रोलर एक संयुक्त संयुक्त घनत्व प्राप्त करने के लिए संयुक्त के गर्म पक्ष पर छोटे से अतिरिक्त दबा सके।

Classification of joints 
1- Longitudinal joint
2 - Transverse joint

1 - Longitudinal joint

All longitudinal joints shall be offset at least 300 mm from parallel joints in the layer beneath or as directed, and in a layout approved by the engineer.

सभी अनुदैर्ध्य जोड़ों(longitudinal joints) को परत में समानांतर जोड़ों से कम से कम 300 मिमी ऑफसेट (offset)किया जाएगा या जैसा निर्देशित किया जाये , और इंजीनियर द्वारा layout को approve किया जाये।

Joints in the wearing course shall coincide with either the lane edge or the lane marking, whichever is appropriate.

Longitudinal joints shall not be situated in the wheel track zones.

Wearing couese में जोड़ों (joints)को लेन किनारे या लेन अंकन (edge)के साथ मेल खाना चाहिए, जो भी उपयुक्त हो।

अनुदैर्ध्य जोड़ों (longitudinal joints ) पहिया ट्रैक क्षेत्रों (wheel track zones)में स्थित नहीं होंगे।

2 - Transverse  joint

For transverse joints method
a) above shall apply(All specifications of longitudinal joint) . Transverse joints in the successive and adjoining layers shall have a min. offset of 2 m.

अनुप्रस्थ जोड़ों की विधि के लिए

 a) ऊपर  वाले सभी points लागू होगा।  अनुप्रस्थ जोड़ों में
क्रमिक(successive)और निकटवर्ती (adjoining)परतों में min.2 मीटर का offset होना चाहिये।

Thanks a lot
Mukesh Kumar 


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