GRL Engineers, Inc.’s Post

Low Strain Impact Integrity Testing is a non-destructive method for assessing the integrity of augered cast-in-place piles, drilled shafts, or driven concrete or timber piles. If significant defects are present, test results can estimate their size and location, as well as determine pile length. The Low Strain Test, also known as Pile Integrity Test (PIT) are typically conducted post-installation and curing of the foundation, requiring minimal pile preparation. Due to their simplicity, speed, and cost-effectiveness, these integrity tests can be applied to 100% of piles on-site, and can sometimes be used for existing foundations. YJACK engineers use a handheld hammer to strike the top of the foundation. The impact generates a compressive stress wave within the pile or shaft, monitored by an accelerometer placed atop the structure. As this stress wave travels down the shaft, it reflects upon encountering the base or irregularities, altering the acceleration signal at the pile top. This signal is captured and analyzed using MrGeo - Low Strain Pile Integrity Tester (MrGeo-LSPIT) equipment, interpreted by experienced YJACK engineers. DM us for more information! #YJACK #PileIntegrityTest #LowStrain #PileTest

Macrosynthetic and Steel Fiber Tests . #physicalexperiments #mechanicalexperiments #heatconductivity #concretetest #construction #constructiontechnology

Macrosynthetic and Steel Fibre Tests . #physicalexperiments #mechanicalexperiments #heatconductivity #concretetest #construction #constructiontechnology

𝐏𝐂 𝐒𝐓𝐑𝐀𝐍𝐃   We are back with our #Everydaywire posts! As we have seen in the last 2 posts, concrete needs to be reinforced. PC strand is a third way to achieve this target. PC (Prestressed Concrete) strand plays a crucial role in reinforcing concrete structures, it forms the backbone of modern construction, ensuring durability and enabling innovative architectural designs. Its applications span from bridges and dams to high-rise buildings and nuclear power stations, providing stability in soil anchoring projects.   PC Strand is made by 7 high carbon wires which are stranded to form a cable (a central wire with six outer wires). There are different methods to produce PC strands. First of all, the wire rod must be drawn to the final desired size. Before drawing rod can be prepared in different ways: the most widely used system is in-batch pickling, phosphate and pre-coating. In the last years however, new more ecofriendly systems have been introduced, an example is mechanical descaling with sand belt followed by in-line electrolytic phosphating and in-line neutralization. Some companies even make only mechanical descaling with in-line coating, which is easier to implement, but of course it is not possible to reach the same drawing performance of pickled wire rod. Being high carbon wires, cooling is fundamental to help drawing, this is why usually big drawing machines are used (usually with 900-1200mm diameter capstan) with higher cooling capacity. Pressure dies sometimes help increase lubrication. The lubricants used are calcium lubricants for all the steps, with the possibility to use sodium lubricants in the last drawing steps to achieve a lower lubricant residual. Different calcium and sodium must be chosen according to the rod preparation. After the drawing operation the production process ends with the stranding of the wires and low relaxion furnace, that releases the stress of the strand. The adherence to concrete indeed is critical, this is why a low residual on the final strand is preferred. In some countries the adherence is measured with a specific test (Bond Test) which must be passed to have the possibility to use the strands in construction industry.   Do you need more information? Do not hesitate to contact our staff at info@panchemicals.com   #lubricants #panchemicals #wiredrawing #everydaywire  #PCSTRAND

🔔 The Efficiency of Tuned Liquid Dampers 💡 The Tuned Liquid Damper (TLD) is a liquid filled tank which uses liquid sloshing action to dampen the oscillations of the structure. Pools if designed well can act as a tuned liquid damper and dissipate the input energy through wave breakage, boundry layer friction and the anti-phase force that they impose to a building. Roof is the best place for the construction of a pool that its sloshing frequency has been tuned to the natural frequency of the building. #structuralengineering #earthquakeengineering #civilengineering #mechanicalengineering #seismicdesign #structure #damper #structuralanalysis #engineering #vibrationcontrol #isolator #vibration #dynamic #seismic #nonlinear #response #isolation #controlsystems

The most realistic position of the critical slip surface is obtained when effective strength parameters are used in the analysis. Effective strength parameters, however, are only meaningful when they are used in conjunction with pore-water pressures. In this sense, the pore water pressures are as important in establishing the correct shear strength as the shear strength parameters themselves (SLOPE/W, 2021). #slopestability #geotechnicalengineering #geotechnical #engineering

Does your project demand more heavy duty, horizontal deformation measurement? Look no further than Measurand’s SAAX. With segment lengths of 1000 mm, bracketed by twist-resistant joints and encased in thick-walled stainless steel tubes, SAAX is purpose-built for projects involving soil settlement, rail-line deformation, and pipeline monitoring. Request a quote: https://loom.ly/fIQBMsA #measurand #SAAX #shapearray #inclinometer #deformationmonitoring #horizontaldeformation #requestaquote

NEW BLOG: What is CSL and how does it Keep our Roads, Bridges and Infrastructure Safe? A Cross-Hole Sonic Logging (CSL) test, also known as a sonic logging test or ultrasonic cross-hole test, is a non-destructive method for evaluating and determining the structural integrity of concrete piles, concrete drilled shafts and other deep foundation elements. Crosshole sonic logging (CSL) testing has several benefits, including:  ☑️ Locating defects: CSL can detect defects in the shaft center and between tubes, which Gamma-Gamma tests cannot. CSL can show the depth, extent, and approximate location of damage in a drilled shaft or pile.  ☑️ Speed: CSL is faster than other tests.  ☑️ Cost: CSL is cheaper than other tests.  ☑️ Safety: CSL is safer than Gamma-Gamma tests and doesn’t require special precautions.  ☑️ Accuracy: CSL testing is a reliable and accurate method for assessing the integrity of deep foundation elements, and is considered more accurate than sonic echo testing. ☑️ CSL testing is quicker, cheaper, more accurate, and safer than other methods. 🖱️ READ: https://lnkd.in/eEyygHrR

"🔍✅ Ensuring precision in construction projects is paramount, especially when it comes to borehole integrity. Check out this insightful practice video showcasing how to effectively test borehole diameter, verticality, and sediment thickness using the cutting-edge Tensense Ultrasonic Borehole & Diaphragm Wall Monitor. Watch now to learn essential techniques for maintaining accuracy and quality in your construction endeavors! #Construction #BoreholeTesting #PrecisionMonitoring"

#proveit #moneywhereyourmouthis 𝑾𝒂𝒕𝒄𝒉 𝒕𝒉𝒊𝒔 𝒔𝒉𝒐𝒓𝒕 𝒗𝒊𝒅𝒆𝒐: https://lnkd.in/eMu3XtS5 𝐇𝐨𝐰 𝐭𝐨 𝐓𝐞𝐬𝐭 𝐆𝐫𝐚𝐯𝐢𝐭𝐲 𝐅𝐢𝐥𝐭𝐞𝐫𝐬 𝐏𝐨𝐬𝐭-𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧 𝑾𝒉𝒚 𝑶𝒓𝒕𝒉𝒐𝒔 𝒕𝒆𝒔𝒕𝒔 𝒈𝒓𝒂𝒗𝒊𝒕𝒚 𝒇𝒊𝒍𝒕𝒆𝒓𝒔 𝒑𝒐𝒔𝒕-𝐢𝒏𝒔𝒕𝒂𝒍𝒍𝒂𝒕𝒊𝒐𝒏 • Testing verifies structural strength and validate proper distribution. • Owners and engineers often delegate 𝐬𝐨𝐥𝐞𝐥𝐲 𝐭𝐨 𝐭𝐡𝐞 𝐦𝐚𝐧𝐮𝐟𝐚𝐜𝐭𝐮𝐫𝐞𝐫 whether the filters operate properly. There is clearly a conflict, and certainly not in the best interest of the owner when there's no objective testing criteria other than the manufacturer’s opinion. 𝑻𝒉𝒆 𝑻𝒘𝒐 𝑴𝒐𝒔𝒕 𝑰𝒎𝒑𝒐𝒓𝒕𝒂𝒏𝒕 𝑻𝒆𝒔𝒕𝒔 𝐎𝐍𝐄: Air Scour Portion of The Underdrain Flow Distribution Test • The filter is filled with water to 6” above the underdrain after the underdrain’s structural integrity is verified. 𝐓𝐖𝐎: Flow Distribution Tests for Sand, Anthracite, and GAC • Media may be placed into the filter per AWWA guidelines after the structural and air-water distribution tests are passed. Measurements are taken to validate the levelness of the media surface following backwash.