RUBBLIZATION OF PCC USING A RESONANT BREAKER …
Rubblization Technology Summary. Rubblization technology eliminates the source of reflective cracks. Rubblization technology is a process of fracturing concrete slabs into …
Quasco Resonant Rubblizing Process for Concrete …
Unlike hydraulic or drop hammers, the high frequency, low impact nature of the resonant rubblizing technology produces minimal noise. Quasco's resonant rubblization process minimizes the impact n a community in …
RUBBLIZATION OF PCC USING A RESONANT BREAKER …
Recommended State Specification • High Frequency Low Amplitude Resonant Breaker • Resonant Breaker shall apply 900 kg. of pressure per strike at 44 Hz • Removal of any Existing Asphalt Overlay • Majority of Particle Size of Less than 15 cm. • Maximum Particle Size of 20 cm. • 10 Ton High Frequency - Low Amplitude Vibratory Roller •3 Passes with …
DETERMINATION OF RESONANT VIBRATION FREQUENCY OF CONCRETE …
Wang, J C.K., Auskern, A, and Horn, W. DETERMINATION OF RESONANT VIBRATION FREQUENCY OF CONCRETE BY AN ACOUSTIC IMPACT TECHNIQUE..United States: N. p., 1972. Web.
Resonance Frequency Meter for Concrete Testing
The frequency spectrum is computed and displayed by the meter. Three different modes of vibration are measured: longitudinal, transverse (flexural), and torsional. Samples with cross-section up to 6in (150mm) and length from 1.75in (45mm) to 28in (700mm) can be tested. The frequency range is 10Hz to 40kHz, with 4.9 to 78.1Hz resolution.
COMPREHENSIVE PAVEMENT DESIGN MANUAL
PORTLAND CEMENT CONCRETE PAVEMENT Joint Resealing 1 Crack 2Sealing. Diamond 2Grinding, Texturing ... breaker and 50 ton roller are used to crack seat the pavement. retard transverse crack joint and slab cracks through an ... resonant frequency machine is used to rubblize pavement to aggregate size Use where PCCP …
ASTM C215-19
1.1 This test method covers measurement of the fundamental transverse, longitudinal, and torsional resonant frequencies of concrete prisms and cylinders for the purpose of calculating dynamic Young's modulus of elasticity, the dynamic modulus of rigidity (sometimes designated as "the modulus of elasticity in shear"), and dynamic Poisson's …
Machine Specs | Resonant Machines
RMI's Resonant Beam Technology – concrete rubblizing and breaking machine is capable of rubblizing or breaking concrete at a rate of 7,000 square yard per day and concrete as thick as 26." ... – Computerized digital control for precision resonant beam amplitude and frequency. Steering: – Hydraulic power steering
Potential Application of Using Multi-Head Pavement Breaker …
Rubblization is a process of mechanically breaking the existing concrete pavement into smaller-sized pieces using heavy-duty pavement breakers, such as …
Resonant frequency breaker used in trial sections.
Resonant frequency breaker used in trial sections. Source publication. +6. Concrete pavement rehabilitation procedure using resonant rubblization technology and …
(PDF) Identification of Resonant Frequency on Concrete Piles …
Most experimental resonant frequency points scatter along the longitudinal guided wave curves within a 5% range for frequency less than 1,000 Hz. Therefore, using guided wave theory can ...
Low-frequency bandgap characteristics of a new cement …
Cement-based locally resonant phononic crystals. Low-frequency bandgap. ... When the scatterer radius R 1 is 0.05 m, the single oscillator cement-based LRPCs opens a low-frequency bandgap, the bandgap range is 39.96–72.00 Hz, the bandgap width is 32.04 Hz. The scatterer radius is reduced to 0.045 m, the bandgap range is 45.05–65.87 Hz, and ...
SPECIAL SPECIFICATION 3123 Rubblizing Concrete …
Provide a self-contained, self-propelled, resonant frequency breaker, capable of producing low-amplitude, 2000 lb blows, at a rate not less than 44 Hz. Type II Rubblizer. Provide a self-contained, self-propelled, multiple-head breaker, with each hammer independently adjustable, and capable of rubblizing a width of up to.
15.6: Resonance in an AC Circuit
Exercise 15.6.3 15.6. 3. The resonant angular frequency of an RLC series circuit is 4.0 ×102 rad/s 4.0 × 10 2 r a d / s. An ac source operating at this frequency transfers an average power of 2.0 ×10−2W 2.0 × 10 − 2 W to the circuit. The resistance of the circuit is 0.50Ω 0.50 Ω. Write an expression for the emf of the source.
Fundamental Transverse, Longitudinal, and Torsional …
The frequency counter shall have an accuracy of 6 1 % over the range of use. N OTE 5ÑThe maximum frequency that can be measured using a digital waveform analyzer and the fast Fourier transform method is one-half the sampling frequency; for example, a sampling frequency of 30 kHz will allow measuring resonant frequencies up to 15 …
Cement-based material characterization using nonlinear …
Cement-based material characterization using nonlinear single-impact resonant acoustic spectroscopy (NSIRAS) J. N. Eiras, T. Kundu, J. S. Popovics, J. Payá Civil and Architectural Engineering and Mechanics
Measuring Young's Modulus of Low-Density Concrete Using Resonant
The resonant frequency test (ASTM C215) is specified for evaluating dynamic Young's modulus of normal concrete. ... and Torsional Resonant Frequencies of Concrete Specimens, ASTM International ...
Measuring the Natural Frequency of Concrete
The natural frequency of concrete can be controlled by adjusting the material properties, dimensions, and boundary conditions of the structure during the design and construction phase. Measures such as adding damping materials can also be implemented to reduce the natural frequency and prevent resonance.
Rubblizing to rehabilitate existing pavements
• Specification requirements for Resonant Breaker include: "The equipment will consist of a self-contained, self-propelled resonant frequency pavement breaking unit capable of producing low amplitude, …
Resonant Frequency Calculator for LC Circuit
To calculate the resonant frequency of a circuit composed of an inductor and a capacitor, follow these steps: Write down the capacitance C in farads. Write down the inductance L in henries. Input both parameters in the resonant frequency formula: f = 1 / (2π × √ (L × C)). C C — The circuit capacitance.
Determining Elastic Properties of Concrete Using Vibrational Resonance …
The dynamic modulus was calculated by measuring the fundamental resonant frequencies of longitudinal and transverse vibration modes, adapting the American standard for concrete (ASTM C215) for mortar.
SPECIAL SPECIFICATION 3107 Rubblizing Existing …
A self-contained, self-propelled, resonant frequency breaker, capable of producing low-amplitude, 2,000 lb. blows, at a rate not less than 44 Hz. B. Type II Rubblizer. A self-contained, self-propelled, multiple-head breaker with each hammer independently adjustable and capable of rubblizing a width of up to 13 ft. in one pass.
Robustness of Resonant Frequency Test for Strength Estimation of Concrete
The resonant frequency test (RFT) of molded concrete specimens is a nondestructive test (NDT) method for indirect strength estimation based on the fundamental mode characteristic resonance frequency. In this article, experimental, numerical, and analytical studies were performed to assess the sensitivity of test results to various …
Acoustoelastic effects on the resonance frequencies of …
The resonance frequencies of the beams were measured during the post-tensioning process, which was performed in steps of approximately 100 kN up to 950 kN, where 100 kN corresponds to approximately 1 MPa of concrete stress.The prestressing force was then reduced back to zero load in similar steps, see Fig. 4.During the entire …
Resonant Frequencies
The accompanying diagram depicts 2 walls, one an 8" concrete block wall and the other a steel stud and gypsum board wall. Each have the same single STC value of 47 but they each have different sound isolation characteristics. ... This drop is known as the "coincidence dip" which reflects the resonant frequency of the wall assembly.
The Art of Rubblizing | Resonant Machines
All of the data showing the benefits of Rubblization have been derived from concrete broken by Resonant hammers. The "fractures" throughout the slab of low amplitude, high frequency resonant broken concrete eliminate slab action and prevent reflective …
What is Resonant Frequency and How to Calculate it?
A resonant frequency is the natural vibrating frequency of an object and denoted as 'f' with a subscript zero (f 0 ). When an object is in equilibrium with acting forces and could keep vibrating for a long time under perfect conditions, this phenomenon is resonance. In our daily life example of a resonant frequency is a pendulum.
(PDF) Concrete pavement rehabilitation procedure …
Article. Full-text available. Jul 2022. Wenjie Li. Ying Guo. Bin Liang. Jinchao Yue. View. Show abstract. ... [1] The crushing methods of concrete pavement include the application of a multi-head...
Quasco Resonant Rubblizing Process for Concrete Breaking
Reduced Noise. Unlike hydraulic or drop hammers, the high frequency, low impact nature of the resonant rubblizing technology produces minimal noise. Quasco's resonant rubblization process minimizes the impact n a community in many ways.
(PDF) Resonant frequency in fibre reinforced concrete: …
The objectives of the current study are to analyze the resonant frequency of concrete under the influence of (1) polypropylene fibres, (2) pozzolans (partial substitution of cement with PFA and SF), and (3) curing conditions. An experimental programme was conducted in the Heavy Testing Laboratory of Building and Construction Department in City ...