Masonry. In this article, different kinds of stone masonry used are explained, and points to be observed while supervising stone masonry works are listed. The choice of stones for shape is another factor deserving many studies. Moreover the locking of stones should be done careful so that the interlocking between them is strong and prevents slippery. The stone masonry has very high crushing strength due to which it is used in the construction of dams, … (i) Uncoursed rubble masonry: This is the cheapest, roughest and poorest form of stone masonry. (iii) Coursed rubble masonry of the second sort. It fits into the surroundings better than more formal kinds of masonry … These courses are not necessarily of the same height but may rise by steps. Also, read: What Is Concrete | 31 Different Types of Concrete. • The specifications for rubble masonry will apply to rubble masonry laid dry (see 1555), except as to the use of the mortar. This work is said to be random coursed. Most of the low retaining walls, slope walls, and miscellaneous structures in part projects are laid up in rubble masonry. ... RR is Random Rubble and DR is Dry Rubble. Sometimes in building large structures, as dams, the rubble is made of cyclopean blocks, and wet concrete is used instead of mortar. The minimum thickness of random rubble work that can be constructed with great care is 225 mm (9″) and with ease 300 mm (1 ft). Masonry constructed using undressed or partially dressed stones in a random order is called Random Rubble Masonry. For these projects, it is the most attractive masonry when well built, and satisfies all of the requirements of such field structures. Random rubble masonry is the first variety of stone masonry. Be the first to answer! These other classes and combinations of types of arc often used with distinctive names. Rubble masonry is rough, uneven building stone set in mortar, but not laid in regular courses. 7. When coursed, the stones are leveled off at specified heights to an approximately horizontal surface. Ashlar is stone dressed to permit laying with uniformly thick horizontal joints l/2 inch thick or less. These type of masonry is used for temporary works. The bed for the stone must be thoroughly clean and wetted down. (i) Random Rubble Masonry. * {{quote-magazine, date=2013-06-29, volume=407, issue=8842, page=28, magazine=(The Economist) , title= High and wet, passage=Floods in northern India, mostly in the small state of Uttarakhand, have wrought disaster on an enormous scale. Difference between rubble masonry and ashlar masonry 1 See answer kittu4028 is waiting for your help. Un-coursed Random Rubble Masonry The random rubble masonry constructed without forming courses is Uncoursed Random Rubble Masonry. Many variations in the thickness of the joints will destroy whatever beauty the pattern may have in other respect. Your email address will not be published. The length of the stones may vary a great deal. Also, read: What Is Standard Proctor Test & his Detail | Procedure Standard Proctor Test. Dry rubble masonry :- This type of masonry is used in the constructiopn of retaining walls, pitching earthen dams and canal slops in the form of random rubble masonry without any mortar. Random Rubble Masonry. The art of building a structure in stone with any suitable masonry is called stone masonry. Rubble and ashlar stones are two types of stones used for wall construction. The courses are not always of the same height. The construction of this form is similar to that of ordinary rubble masonry without mortar. Square rubble masonry Coursed 8. What is CRS masonry? (i) Uncoursed rubble masonry: This is the cheapest, roughest and poorest form of stone masonry. Dressed as not to permit laying with uniformly thick joints or horizontal joints inch! Construction of this form the stones may vary a great deal waiting for your help are removed. 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