tag:blogger.com,1999:blog-6708423.post7766119229495388320..comments2024-03-27T17:00:28.247+08:00Comments on Maverickysm Blogspot: MRR2 FAILURES: Would the TRUTH be told?Maverick SMhttp://www.blogger.com/profile/02871611453372513136noreply@blogger.comBlogger20125tag:blogger.com,1999:blog-6708423.post-62491938935917993802009-07-30T10:39:24.556+08:002009-07-30T10:39:24.556+08:00should use macalloy or dwideg bar with an open anc...should use macalloy or dwideg bar with an open anchorage system. the original consultant did not take into consideration maintenability issue.Anonymoushttps://www.blogger.com/profile/10987958991304694987noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-24243494706377163132008-08-11T14:44:00.000+08:002008-08-11T14:44:00.000+08:00SeeFei,You can be assured that all the tests inclu...SeeFei,<BR/><BR/>You can be assured that all the tests including petrography was done and analyzed and the result gave the same conclusion.Maverick SMhttps://www.blogger.com/profile/02871611453372513136noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-73497806856117391662008-08-11T13:07:00.000+08:002008-08-11T13:07:00.000+08:00dear SMsorry i din read yr earlier posts. my apolo...dear SM<BR/>sorry i din read yr earlier posts. my apology. from the crack lines pattern drawn on the graph paper, the crack lines look like shear crack. design inadequacy cannot be ruled out.<BR/><BR/>however, concrete performance depend on the dual interaction between the concrete and the reinforcement. hence, a study of the hardened concrete is necessary. Maybe the use of petrography will shed some light on the issue. petrography is a microscopic assessment of the concrete thru thin slice. workmanship history, material usage, additive usage, water cement etc can be evaluated.<BR/><BR/>a check on the reinforcement sizes and spacing is also necessary. intrusive and ndt should be carried out.<BR/><BR/>if you are pursuing the "overloading" theory, evaluation of the progress photograph is necessary to understand the loading scenario during the construction process.<BR/><BR/>my 2 cents worth...seefeihttps://www.blogger.com/profile/13678700448170267302noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-37976748849825161702008-08-07T23:45:00.000+08:002008-08-07T23:45:00.000+08:00Fair Comment,Thanks for your clarification; and I ...Fair Comment,<BR/><BR/>Thanks for your clarification; and I didn't miss your point.<BR/><BR/>My subject is about the structural failure, not the repair defects. the repair defects is a minor issue and the repair specialist will be responsible to make good.<BR/><BR/>But you have not considered the Clause 2.8.4 as stated above. If there is a failure during the execution of the work or during defect liability period and the contractor fails to make good, the PD has a right to engage a third party to carry out the works and the contractor shall still be responsible for the original defect.<BR/><BR/>I am a research engineer and I have been doing research on structural failures in bridges and buildings for many years. The information sourced are available in Universities (local and overseas, particularly in Australia) and from other thesis done by many under-graduates and post-graduates everywhere who are also doing similar research.<BR/><BR/>I must say that CFRP and prestressing technique are not new in Malaysia and there are quite many prestressing companies doing such work.<BR/><BR/>What I wrote was based on the law of contracts and from documents available in the public domains including universitiesMaverick SMhttps://www.blogger.com/profile/02871611453372513136noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-61705032611792308392008-08-07T17:05:00.000+08:002008-08-07T17:05:00.000+08:00Mave,1) You missed my point on my comment (1); the...Mave,<BR/><BR/>1) You missed my point on my comment (1); the sun's rpt never mentioned that the CFRP peeled off due to DEF or attributed to this from R.Buckby.This was your own interpretation,no? Read again !! ! Nevertherless,you are entitled to your opinion on how the earlier cracks evolved and I hv not commented on that,eventhough I would give the probability of doubt to Halcrow for the in depth study they hd conducted on the concrete samples taken from site.<BR/><BR/>2)You displayed several crack mapping diagrams in your article,so I assumed you hd your contact probably within JKR circle too.Surely then,you must know the politics(it's been revealed anyway by Citizen Nades in the same sun's editn too)involved at the highest level too.So how sure are you that the contractual rights had not been compromised by the govt's(read certain top JKR gun) own folly of "bulldozing" the repair using their preferred repair consultant???If things are ever so straightfwd,lawyers will be outta job!!! Get it???<BR/><BR/>3)BTW,I agree with you that using carbon fibre technology for structural repair works is nothing new in Malaysia, BUT in MRR2,LAP introduced "prestressed" carbon fibre technique which have never been used in M'sia( to the best of my knowledge),what more on a large scale repair like this.So, you may want to tell Nades the right fact?<BR/><BR/>Fair comment,Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-46258277164020273422008-08-07T15:37:00.000+08:002008-08-07T15:37:00.000+08:00SeeFei,Your theory is correct; but this is not the...SeeFei,<BR/><BR/>Your theory is correct; but this is not the case here. It was about under-design provisions and recklessness of overloadings during the construction phases and the problem of the loadings imposed by the gantry cranages during construction stage.Maverick SMhttps://www.blogger.com/profile/02871611453372513136noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-15040924599089538552008-08-07T15:35:00.000+08:002008-08-07T15:35:00.000+08:00Fair Comment,I had a day earlier provided with the...Fair Comment,<BR/><BR/>I had a day earlier provided with the photographic proof of the crack patterns to show that the original cracks was never due to DEF of which Halcrow attributed it. It was stress cracks from direct loadings in access of capacity and also attributed to the provisions of the lappings of steel bars and the issue of insufficient anchorage into the crossbeam.<BR/><BR/>You have failed to understand the contract: the contract states that the contractor is responsible for the integrity and safety of the structure. The contract provides that, in the event the contractor did not carry out the defect rectification, the Govt can engage a 3rd party to rectify, but the responsibility and liability remains with the main contractor.<BR/><BR/>You failed to understand that the repair work was merely strengthening due to design failure and the project and the structure is still under defect liability guarantee and warranty. There is a 5 years design warranty and in the case of inherent defects in design it is perpetual period.<BR/><BR/>I suppose you do not understand the contractual rights and obligations of the agreement.Maverick SMhttps://www.blogger.com/profile/02871611453372513136noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-35229410255440087462008-08-07T15:27:00.000+08:002008-08-07T15:27:00.000+08:00Kenny Ng,The design has taken into consideration t...Kenny Ng,<BR/><BR/>The design has taken into consideration the live loads, and include distress conditions.<BR/><BR/>CK,<BR/><BR/>My emphasis is on design engineering and contractual terms and conditions and did not cover the aspects and considerations regarding the political management.<BR/><BR/>Bayi,<BR/><BR/>Ya, it is what is stated in the contract.<BR/><BR/>Mohdaslanr,<BR/><BR/>I can assure you that the contract is PWD DB/T -Design and Built. I have the contract numbers.<BR/><BR/>Yok Hoong,<BR/><BR/>Ya, it is technical and I do not expect the general populace to understand the technical issue. But I want to provide the essence of the failures so that the people have a true knowledge.<BR/><BR/>Moo_t,<BR/><BR/>I think the cabinet members were not feeded with the true story.<BR/><BR/>Highway Robber,<BR/><BR/>That's not in this discourse.<BR/><BR/>Hasilox,<BR/><BR/>That, the political masters and PAC must explain.Maverick SMhttps://www.blogger.com/profile/02871611453372513136noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-26644125783155300122008-08-07T14:25:00.000+08:002008-08-07T14:25:00.000+08:00early thermal shrinkage? the concrete temperature ...early thermal shrinkage? the concrete temperature must be too high during concreting causing early formation of entringgite at a later stage!!seefeihttps://www.blogger.com/profile/13678700448170267302noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-14564320219848044952008-08-07T14:14:00.000+08:002008-08-07T14:14:00.000+08:00mave,1)pls read the sun's report again....i do...mave,<BR/><BR/>1)pls read the sun's report again....i don't think that Roger Buckby attributed the cause of the CFRP peeling off to the occurrence of DEF. I believed he meant DEF contributed to the earlier cracks that led to Halcrow being appointed to investigate the cause.<BR/><BR/>2)If the earlier cracks were due to design inadequacy,I concur with you that the "Design & Build" contractor would be responsible.But for the repair work, if the German repair Consultant appointed by JKR ie LAP recommended an inappropriate repair method(allegedly by Roger Buckby),why should the contractor be responsible in this case?? You seemed to be contradicting yourself here. We need to have an open mind on this.<BR/><BR/>Fair comment.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-71845689997653899012008-08-07T12:48:00.000+08:002008-08-07T12:48:00.000+08:00Good analysis.The previous RM70m repair was paid w...Good analysis.<BR/><BR/>The previous RM70m repair was paid with taxpayers' money. If the contractor can actually make money out of their mistake, where is the motivation to rectify?<BR/><BR/>Is this another project built using taxpayers' money, profit to concessionaire and decades of payment by taxpayers?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-47996873087515515282008-08-07T12:08:00.000+08:002008-08-07T12:08:00.000+08:00THE TRUTH IS CRONIES MADE MILLIONS AND THE HIGHWAY...THE TRUTH IS CRONIES MADE MILLIONS AND THE HIGHWAY WILL DEFINITELY COLLAPSE AND KILL HUNDREDS.<BR/><BR/>HIGHWAY ROBBERAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-25396821248825248142008-08-07T12:00:00.000+08:002008-08-07T12:00:00.000+08:00Apparently, there is an evasive maneuver from the ...Apparently, there is an evasive maneuver from the BN government on behalf of the contractor (WTH!). <BR/><BR/>The MRR2 issues happen more than 2 years, but there <BR/><BR/>-------------<BR/>mohdhaslanr, you make me laugh. Did you read the whole blog? Did you notice Doc mentioned Clause 2.3.2? <BR/><BR/>Now tell me, you pay and sign the contract, ARE YOU GOING to manage the subcontractor under the main contractor! If otherwise, then tell me, what is the purpose of a agreement contract? Is it a toilet paper to you? <BR/><BR/>As client, you don't give it damn if the subcontractor f*ck up, because there is an agreement to follow. <BR/><BR/>If the main contractor careless about selection of subcontract, they must take ALL responsible. And whether the main contractor sign another clause with the subcon, that is their job! If main contractor didn't sign clause to cover their own ass from the subcontractor shoddy works, nobody can help!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-65264089705445237632008-08-07T11:44:00.000+08:002008-08-07T11:44:00.000+08:00Carbon-fibre technology has been used extensively ...Carbon-fibre technology has been used extensively in Japan and in the USA for post-construction strengthening of old bridges and buildings especially against earthquakes. <BR/><BR/>It is proven technology.<BR/>Its very high strength vs. weight (many times more than steel) makes it attractive to use for reinforcing existing structures without adding substantial additional weight.<BR/><BR/><BR/>However its still an unusual material to most civil engineers and contractors may not be well versed in how to apply it correctly.Monsterballhttps://www.blogger.com/profile/05482725674818312298noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-282815901074650742008-08-07T11:19:00.000+08:002008-08-07T11:19:00.000+08:00haiyooo...i dont understand all this engineering t...haiyooo...i dont understand all this engineering thingy.but rather than put all the blame on the govt,i hope the govt gonna look through this matter and solve it asap since it involves humans life.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6708423.post-50801257964170358742008-08-07T11:14:00.000+08:002008-08-07T11:14:00.000+08:00mavthanks for the insight although some parts are ...mav<BR/><BR/>thanks for the insight although some parts are too technical for a layman to understand. but the bottom is clear which is the contractor must bear the ultimate responsibilities.<BR/>will the authorities take the contractor to task? thats the key question and i am skeptical given the track record of the authorities.Unknownhttps://www.blogger.com/profile/12014826619601424997noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-13096717359858159362008-08-07T09:29:00.000+08:002008-08-07T09:29:00.000+08:00HaiI think the contractor will take a full respons...Hai<BR/>I think the contractor will take a full responsibility for the design only if he the contractor was the designer itself (i,e, design & build) but in the case of MRR2 I am not sure if it was a design and built contract.<BR/>Regardsmohdhaslanrhttps://www.blogger.com/profile/07307082675341572606noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-2504658834550509552008-08-07T06:07:00.000+08:002008-08-07T06:07:00.000+08:00"Under Clause 2.6, The Contractor shall take full ..."Under Clause 2.6, The Contractor shall take full and unequivocal responsibility for the safety of the design and for the adequacy, stability and safety of all site operations and methods of construction."<BR/><BR/>The contractor to take full responsibility for the design? Is this the usual and normal practice, Mave?bayihttps://www.blogger.com/profile/03413164906253126642noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-67590653518350860912008-08-07T05:49:00.000+08:002008-08-07T05:49:00.000+08:00as long as cronies are involved, they will be prot...as long as cronies are involved, they will be protected if they are in the right camp.<BR/><BR/>tat's the pathetic fact. it's not once, not twice but third time now. just when are the BN gomen gotta learn?CKhttps://www.blogger.com/profile/12664785949728997967noreply@blogger.comtag:blogger.com,1999:blog-6708423.post-289811563641902402008-08-07T04:17:00.000+08:002008-08-07T04:17:00.000+08:00That's more detail about the cause of cracks. ...That's more detail about the cause of cracks. The design maybe is just for 3-4 lanes, but Malaysian drivers will line-up till 6-7 lanes during traffic jam just to jump Q, not only that, overloaded lorries & trucks also will give a big impact on it.<BR/><BR/>Where is the design safety factors?Anonymoushttps://www.blogger.com/profile/01852500840085632003noreply@blogger.com