Question

A concrete masonry unit was tested with the following results:

Saturated mass of unit 8.484g

Oven-dry mass of unit 6.363g

Absorption of mass unit 10%

Determine the free moisture content as a percent of total moisture (%).

Answer #1

The answer is given in following image:

P.s- if you have any difficulties with my handwriting in image then let me know through comments, I'll clarify. And please upvote if you find my answer helpful. Thank you in advance.

A concrete masonry unit was immersed in water for 24 hrs
according to specifications and the following results were
obtained: - mass of unit as received = 24.25 lb. - saturated mass
of unit = 26.15 lb. - oven-dry mass of unit = 22.10 lb. -immersed
mass of unit = 12.60 lb. It is required to Calculate the absorption
in lb/ft3 , percent absorption, and moisture content of the unit as
a percent of total absorption.

A concrete masonry unit was tested for compressive strength and
produced the following results:
Failure load = 750 kN
Gross area = 0.085 m2
Gross volume = 0.013 m3
Net volume = 0.008 m3
Is the unit categorized as solid or hollow?
What is the compressive strength? Does the compressive strength
satisfy the ASTM requirements for load bearing units?

A concrete masonry unit is tested for compressive strength and
produces the following results:
Failure
load = 120,000 lb
Gross
area = 130 in2
Gross
volume = 960 in3
Net
volume = 447 in3
Is the unit categorized as solid or hollow? Why? What is the
compressive strength? Does the compressive strength satisfy the
ASTM requirements for load bearing units shown in Table 8.2?

A concrete masonry unit is tested for compressive strength and
produces the following results: Failure load = 100000 lb Gross area
= 170 in2 Gross volume = 960 in3 Net volume = 836 in3 Please round
to the nearest hundredth (i.e., 0.01). 1. What is the percentage of
net cross-sectional area? = Answer % 2. Is the unit categorized as
solid or hollow? Write down either solid or hollow. No spaces, and
case is unimportant. Answer 3. What is the...

Concrete is required for an interior concrete column in a
commercial building in Corvallis, Oregon. A specified compressive
strength, f’c , of 4000 psi is required at 28 days using
an ASTM C 150 Type I. The design calls for a minimum of 3 in. of
concrete cover over the reinforcing steel. The minimum distance
between reinforcing bars is 2.5 in. A slump of 4 inches should be
the target. No statistical data on previous mixes are available.
Follow mixture...

... 00 E H.W 1. Design concrete mix according to ACI
with volumetric equation, and calculate the quantities of concrete
ingredients for a slab and 5 bored piles (Show your results in a
Table). Average compressive strength required at 28 days = 35 N /
mm 'with Slump is (75-100). Dry rodded mass of coarse aggregate is
1600kg / m3. Fineness modulus of fine aggregate is 2.9. the
concrete will be exposed to mild waves of freezing and thawing. The...

Calculate the field weights of the ingredients for 0.039 m3 of
concrete by using ACI Method of Mix Design. Job specifications
dictate the followings:
Cement content: 300 kg/m3
w/c: 0.57 (by weight, from the strength point of view)
w/c: 0.53 (by weight, from durability point of view)
Fine Aggregate (SSD)/Coarse Aggregate (SSD)=0.45 (by weight)
Air Content: 1,30 %
For Fine Aggregate (Crushed): SSD Bulk Specific Gravity: 2.47,
Total Moisture: 5,0 % and Absorption Aggregate: 2,7
%.
For Coarse Aggregate (Crushed):...

From a field data,
Required compressive strength of an OPC air entrained concrete
column at a moderate exposure is 37±3
MPa. Determine the amount of the
ingredients in kg, per 1m3 of concrete: (a) water (b)
cement (c) percent air content (d) coarse aggregate (No need to
adjust moisture for coarse
aggregate):
Given,
Nominal maximum size of coarse aggregate is 25
mm
Bulk OD specific gravity of coarse aggregate is
2.64
Oven dry-rodded density: 1650
kg/m3
Fineness modulus...

) The following recipe was determined as part of a concrete mix
design:
Water-cement ratio:
0.48
Coarse
aggregate: 0.60
ft3 CA (bulk volume, dry-rodded) per ft3
concrete
Water requirement:
9.6 lbs/ft3 (before moisture corrections)
Air
content:
5.0% by volume
Assuming that the CA and FA to be used
in the mix are both at SSD, the moisture content of the CA is 0.5%,
the moisture content of the FA is 2.5%, the specific gravity of the
CA and FA particles...

Given the following data: Initial sample mass = 0.528
kg,
Surface dry mass = 0.517 kg.
Oven dry mass = 0.48 kg
What is the dry mass of the fine aggregates if the total
sample weight is 40 kg?
a.
35.364 kg
b.
37.136 kg
c.
36.364 kg
d.
30.264 kg

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 25 minutes ago

asked 36 minutes ago

asked 44 minutes ago

asked 47 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago